Note4Students
From UPSC perspective, the following things are important :
Prelims level: Sir Chettur Sankaran Nair
Mains level: Not Much
A noted filmmaker has recently announced his decision to produce the biopic of Sir Chettur Sankaran Nair, an acclaimed lawyer and judge in the Madras High Court and one of the early builders of the Indian National Congress.
Sir Chettur Sankaran Nair
- Nair was born in the year 1857 in Mankara village of Malabar’s Palakkad district.
- He belonged to an aristocratic family and his great grandfather was employed by the East India Company to enforce peace in the Malabar region.
- His grandfather was employed as the chief officer under the Civilian Divisional Officer.
His legal career
- Nair was drawn towards Law while he was completing his graduation from Presidency College in Madras.
- After completing his degree in Law, he was hired by Sir Horatio Shepherd who later became the Chief Justice of the Madras High Court.
- Since his early days as a lawyer, Nair was known for his defiant attitude.
- He went against a resolution passed by Indian vakils (advocates) of Madras stating that no Indian vakil would work as a junior to an English barrister.
- His stance on the issue made him so unpopular that he was boycotted by the other vakils, but he refused to let that bother him.
Legacy
- Nair was known for being a passionate advocate for social reforms and a firm believer in the self-determination of India.
- But what really stood out in his long glorious career is a courtroom battle he fought against the Lieutenant-Governor of Punjab, Michael O’Dwyer.
- Nair had accused O’Dwyer in his book, ‘Gandhi and anarchy’ for being responsible for the atrocities at the Jallianwala Bagh massacre.
- Consequently, he was fighting against an Englishman, in an English court that was presided over by an English jury.
- In all senses, the case was bound to make history.
- When the 1908 Montague-Chelmsford reforms were being discussed, he wrote an article in the Contemporary Review criticizing the English jury for being partial towards Englishmen.
- This infuriated the Anglo-Indian community who petitioned the Viceroy and the Secretary of State for India objecting to his appointment as high court judge the first time.
- He was once described by Edwin Montague, the secretary of state for India as an ‘impossible person’.
Key positions held
- In 1897 he became the youngest president of the INC in the history of the party till then, and the only Malayali to hold the post ever.
- By 1908 he was appointed as a permanent judge in the Madras High Court. In 1902 Lord Curzon appointed him a member of the Raleigh University Commission.
- In 1904 he was appointed as Companion of the Indian Empire by the King-Emperor and in 1912 he was knighted.
- In 1915 he became part of the Viceroy’s Council, put in charge of the education portfolio.
Career as judge
- As a Madras High Court judge, his best-known judgments clearly indicate his commitment to social reforms.
- In Budasna v Fatima (1914), he passed a radical judgement when he ruled that those who converted to Hinduism cannot be treated as outcasts.
- In a few other cases, he upheld inter-caste and inter-religious marriages.
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From UPSC perspective, the following things are important :
Prelims level: Last Ice Area
Mains level: Climate Change
A part of the Arctic’s ice called the “Last Ice Area”, located north of Greenland, has melted before expected. Scientists had believed this area was strong enough to withstand global warming.
What is the Last Ice Area?
- In an article published in 2015, National Geographic noted that climate projections forecast the total disappearance of summer ice in the Arctic by the year 2040.
- However, the only place that would be able to withstand a warming climate would be this area of ice called the “Last Ice Area”.
- But while this piece of ice above northern Canada and Greenland was expected to last the longest time, it is now showing signs of melting.
- WWF claims that WWF-Canada was the first to call this area the‘ Last Ice Area’.
Why is the area important?
- The area is important because it was thought to be able to help ice-dependent species as ice in the surrounding areas melted away.
- The area is used by polar bears to hunt for seals who use ice to build dens for their offspring.
- Walruses too, use the surface of the ice for food search.
When did the area start changing?
- The first sign of change in LIA was observed in 2018.
- Further, in August last year, sea ice showed its “vulnerability” to the long-term effects of climate change.
- The ice in LIA has been thinning gradually over the years much like other parts of the Arctic Ocean.
What are the reasons that explain the change?
- About 80 per cent of thinning can be attributed to weather-related factors such as winds that break up and move the ice around.
- The remaining 20 per cent can be attributed to the longer-term thinning of the ice due to global warming.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Not much
Mains level: World History: India's contribution in two World Wars
During his four-day visit to the UK and Italy, the Indian Army Chief will inaugurate the Indian Army Memorial at Cassino in Italy, about 140 km away from Rome.
What is the memorial about?
- The memorial commemorates over 3,100 Commonwealth servicemen who took part in the effort to liberate Italy in World War II.
- Apart from this, 900 Indian soldiers were also commemorated on this memorial.
What was happening in Italy in WWII?
- Under Benito Mussolini, Italy had joined Nazi Germany in 1936 and in 1940 it entered WWII (1939-1945) against the Allies.
- But in 1943, Mussolini was overthrown and instead, Italy declared war on Germany.
- The invasion of Italy by the Allies coincided with an armistice that was made with the Italians.
- Even so, the UK’s National Army Museum notes that for two years during WWII, Italy became one of the war’s most “exhausting campaigns” because they were facing a skilled and resolute enemy.
What was India’s involvement in World War II?
- In the first half of the 1940s, India was still under British rule and the Indian Army fought in both the world wars.
- It comprised both Indian and European soldiers.
- Apart from this, there was the East India Company Army that also recruited both Indian and European soldiers and the British Army, which was also present in India.
India the largest volunteer
- Indian Army was the largest volunteer force during WWII, with over 2.5 million (more than 20 lakh) Indians participating.
- These troops fought the Axis powers (Germany, Italy and Japan) as part of the Allies.
- By 1945, the Allies had won, Italy had been liberated, Adolf Hitler was dead and India was barely a couple of years short of independence.
- However, while millions of Indians participated, their efforts are not always recognized.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Neutron star, Black Holes
Mains level: Gravitational waves observation
In an entirely strange phenomenon, astronomers have spotted two neutron stars being swallowed by different black holes.
What are Black Holes?
- A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
- Neutron stars and black holes are among the most extreme objects in the universe. They are the fossil relics of massive dead stars.
- When a star that is more than eight times as massive as the Sun runs out of fuel, it undergoes a spectacular explosion called a supernova.
- What remains can be a neutron star or a black hole.
There is no upper limit to how massive a black hole can be, but all black holes have two things in common: a point of no return at their surface called an “event horizon”, from which not even light can escape and a point at their centre called a “singularity”, at which the laws of physics as we understand them break down.
What about Neutron stars?
- Neutron stars are typically between 1.5 and two times as massive as the Sun but are so dense that all their mass is packed into an object the size of a city.
- At this density, atoms can no longer sustain their structure and dissolve into a stream of free quarks and gluons: the building blocks of protons and neutrons.
What is the news observation?
- Gravitational waves are produced when celestial objects collide and the ensuing energy creates ripples in the fabric of space-time which carry all the way to detectors on Earth.
- The reverberations from the two celestial objects were picked up using a global network of gravitational wave detectors.
What makes this strange phenomenon?
- This is the first time scientists have seen gravitational waves from a neutron star and a black hole.
- Previous gravitational wave detections have spotted black holes colliding, and neutron stars merging but not one of each.
Why study this?
- Neutron star-black hole systems allow us to piece together the evolutionary history of stars.
- Gravitational-wave astronomers are like stellar fossil-hunters, using the relics of exploded stars to understand how massive stars form, live and die.
Answer this PYQ in the comment box:
Q.“Event Horizon” is related to (CSP 2018):
(a) Telescope
(b) Black hole
(c) Solar glares
(d) None of the above
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From UPSC perspective, the following things are important :
Prelims level: Fukuoka Prize
Mains level: Not Much
Noted journalist P. Sainath has been selected as one of the three recipients of the Fukuoka Prize for 2021.
Fukuoka Prize
- The Fukuoka Prize is given annually to distinguished people to foster and increase awareness of Asian cultures, and to create a broad framework of exchange and mutual learning among the Asian people.
- The Prize was established in 1990 by the city of Fukuoka in Japan and the Fukuoka City International Foundation.
- The Grand Prize has earlier been awarded to Muhammad Yunus from Bangladesh, historian Romila Thapar, and sarod maestro Amjad Ali Khan. Eleven Indians have received the Fukuoka Prize so far.
- 115 people from 28 countries and areas have received the Prize in the past 30 years.
Citation for the award
- In a statement issued Mr. Sainath was described as a “very deserving recipient of the Grand Prize of Fukuoka Prize”.
- The Secretariat noted his work for creating a new form of knowledge through his writings and commentaries on rural India and for “promoting civil cooperation”.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Stone age man and his evolution
Mains level: Not Much
Scientists have announced that a skull discovered in northeast China represents a newly discovered human species they have named Homo longi, or “Dragon Man”.
Answer this PYQ in the comment box:
Q.The word ‘Denisovan’ is sometimes mentioned in media in reference to (CSP 2019):
(a) fossils of a kind of dinosaurs
(b) an early human species
(c) a cave system found in North-East India.
(d) a geological period in the history of Indian subcontinent
Who is the “Dragon Man”, the latest Chinese discovery?
- The cranium found in China has been dubbed the “Dragaon Man” or Homo longi, a name that has been derived from the Long Jiang or Dragon River in the Heilongjiang province of China where the city of Harbin is located.
- The skull was reportedly discovered back in 1933, when a bridge was built over the Songhua River.
- For thousands of years, the skull remained buried in sediments.
- Because of the distinctive shape of the skull, which was found almost complete, some members of the team have suggested that it be declared a part of a new species of the genus Homo.
- Significantly, the size of the skull, which has a considerable brain capacity, is comparable to that of modern humans and Neanderthals.
Why is this discovery being considered significant?
- For one, it brings new knowledge about the evolution of Homo sapiens.
- It might help to bridge the gaps between our ancient ancestors called Homo erectus and us.
- This knowledge is important because there is very little consensus in the scientific community about how different human species are related, and which species are our immediate ancestors.
- Smithsonian for instance notes that some palaeontologists believe Homo heidelbergensis to be our immediate ancestors.
- This species was discovered in 1908, and lived about 700,000 to 200,000 years ago in Europe and possibly China and some parts of Africa.
Back2Basics: Species of Humans
- Modern humans are the only human species that exist in the world today.
- While the exact number of human species is a matter of debate, most scientists believe that there are at least 21 of them.
As per the Smithsonian National Museum of Natural History, there are over 21 human species. Major among these are:
(1) Sahelanthropus tchadensis
- Sahelanthropus tchadensis is believed to be the oldest member of the human family tree.
- It lived about 7-6 million years ago somewhere around present-day Chad in Africa.
- It had both ape-like and human-like features and was bipedalled, an ability that may have increased its chances of survival.
(2) Homo erectus
- Homo erectus lived about 1.89 million-110,000 years ago, in Northern, Eastern, and Southern Africa and Western and East Asia.
- ‘Turkana Boy’ is the most complete fossil belonging to this species and is dated to be around 1.6 million years old.
(3) Modern man
- Homo neanderthalensis lived about 400,000-40,000 years ago and co-existed with Homo sapiens for a few thousand years.
- They lived in Europe and in southwestern and central Asia.
- Homo sapiens evolved about 300,000 years ago, and are found worldwide.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Full Ship Shock Trial (FSST)
Mains level: Not Much
The US Navy Friday carried out a ‘full ship shock trial’ on its newest and most advanced nuclear-powered aircraft carrier to ensure its hardness was capable of withstanding battle conditions.
What is a Full Ship Shock Trial (FSST)?
- During World War II, American warships suffered severe damage from enemy mines and torpedoes that had actually missed their target, but exploded underwater in close proximity.
- The US Navy has since worked to improve the shockproofing of their ship systems to minimize damage from such “near miss” explosions.
- In FSSTs, an underwater explosive charge is set off near an operational ship, and system and component failures are documented.
- The FSST probes whether the components survive shock in their environment on the ship; it probes the possibilities of system failures, and large components that could not be otherwise tested.
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From UPSC perspective, the following things are important :
Prelims level: First-ever genetically modified rubber planted in Assam
Mains level: Hazards of using GMO crops
A Rubber Board research farm on the outskirts of Guwahati now sports the world’s first genetically modified (GM) rubber plant tailored for the climatic conditions in the Northeast.
GM rubber
- The GM rubber has additional copies of the gene MnSOD, or manganese-containing superoxide dismutase, inserted in the plant.
- The plant was developed at the Kerala-based Rubber Research Institute of India (RRII).
- It is expected to tide over the severe cold conditions during winter — a major factor affecting the growth of young rubber plants in the region.
Why need GM rubber?
- Natural rubber is a native of warm humid Amazon forests and is not naturally suited for the colder conditions in the Northeast, which is one of the largest producers of rubber in India.
- Growth of young rubber plants remains suspended during the winter months, which are also characterized by progressive drying of the soil.
- This is the reason for the long immaturity period of this crop in the region.
What does MnSOD gene offer?
- The MnSOD gene has the ability to protect plants from the adverse effects of severe environmental stresses such as cold and drought.
- Laboratory studies conducted at the RRII showed the GM rubber plants overexpressed the MnSOD gene as expected, offering protection to the cells.
- The plant is thus expected to establish well and grow fast in the region.
- There was no risk of genes flowing from the GM rubber into any other native species, a concern often raised by environmental groups against GM plants in general.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Indian monsoon
Mains level: Monsoon and climate change
Rainfall during retreating monsoon, which parts of South India experience every year, is not a local anomaly and is global in nature and scale, according to a recent study by the University of Sydney.
What is Retreating Monsoon?
- In India, retreating monsoon is the withdrawal of south-west monsoon winds from North India.
- The withdrawal is gradual and takes about three months.
- With the retreat of the monsoons, the clouds disappear and the sky becomes clear. The day temperature starts falling steeply.
- Monsoon rains weaken all over India except few southeastern states.
- It is helpful in Rabi crop cultivation.
What has the research found?
- The research has identified regions in the northern hemisphere that receive the bulk of the rainfall during September, October and November and southern hemisphere that receive most of the rainfall from March to August.
- The discovery that these are part of a global pattern and not one-off occurrences means they can be systematically studied, which will help understand how these communities could be affected by climate change.
- Peninsular India and parts of South-East Asia are among the eight regions examined in the study.
Factors affecting the retreat
- The eight global regions identified by the study that receive most of their rainfall after summer, have several things in common.
- They lie on the eastern fringes of landmasses and are in close proximity to mountain ranges with modest heights.
Two predominant factors cause the phenomenon:
- First, the low mountain range in each region runs from north to south, shielding it from west-bound winds that trigger summer monsoon.
- After summer, the range aids in the ‘orographic lift’ or rising of east-bound air mass from a lower to higher elevation, forming clouds and resulting in rain.
- The second factor is atmospheric convection or vertical movement of air.
- As the earth is heated by the sun, different surfaces absorb different amounts of energy and convection may occur where the surface heats up very rapidly.
- As the surface warms, it heats the overlying air, which gradually becomes less dense than the surrounding air and begins to rise.
- This condition is more favorable from September to February because of the role played by sea surface temperature or water temperature.
Answer this PYQ in the comment box:
Q.The seasonal reversal of winds is the typical characteristic of:
(a) Equatorial climate
(b) Mediterranean climate
(c) Monsoon climate
(d) All of the above climates
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Rotation and Revolution of Earth
Mains level: NA
The summer solstice will happen today around 9:02 am on Monday (Indian Standard Time).
What is Summer Solstice?
- Solstice means “sun stands still” in Latin.
- The longest day of 2021 for those living north of the Equator is June 21.
- This day is characterized by a greater amount of energy received from the sun.
- In technical terms, this day is referred to as the summer solstice, the longest day of the summer season. It occurs when the sun is directly over the Tropic of Cancer, or more specifically right over 23.5-degree north latitude.
The Southern Hemisphere receives most sunlight on December 21, 22 or 23 when the northern hemisphere has its longest nights– or the winter solstice.
Why do we have summer solstice?
- Since Earth rotates on its axis, the Northern Hemisphere gets more direct sunlight between March and September over the course of a day.
- This also means people living in the Northern Hemisphere experience summer during this time.
- The rest of the year, the Southern Hemisphere gets more sunlight.
- During the solstice, the Earth’s axis — around which the planet spins, completing one turn each day — is tilted in a way that the North Pole is tipped towards the sun and the South Pole is away from it.
Answer this PYQ in the comment box:
Q.On 21st June, the Sun (CSP 2019):
(a) Does not set below the horizon at the Arctic Circle
(b) Does not set below the horizon at Antarctic Circle
(c) Shines vertically overhead at noon on the Equator
(d) Shines vertically overhead at the Tropic of Capricorn
Some other facts
- Summer solstice does not mean the earliest sunrise or latest sunset.
- Although June 21 will be the longest day in 2021, it does not necessarily mean that it brings the earliest sunrise or latest sunset.
- It depends on the latitudinal location of the country.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: National Maritime Heritage Complex, Lothal
Mains level: Not Much
In order to showcase the maritime heritage and history of India, a National Maritime Heritage Complex (NMHC) will be developed in the Lothal region of Gujarat.
National Maritime Heritage Complex
- It is to note that the National Maritime Heritage Complex will be made within the ASI site of Lothal that is located 80 km away from Ahmedabad in Gujarat.
- The project, once completed, will be made an international tourist destination in India where people from across the countries can take a look at the maritime heritage of India from ancient to modern times.
- The government is aiming to showcase this via an edutainment approach where the latest technology would be adopted to spread awareness.
- The development will be done in an area expanding 400 acres.
- The complex will have many offerings including National Maritime Heritage Museum, Heritage Theme Park, and Light House Museum.
About Lothal
- Lothal was one of the southernmost cities of the ancient Indus Valley Civilization located in Gujarat.
- Construction of the city began around 2200 BCE.
- According to the ASI, Lothal had the world’s earliest known dock, which connected the city to an ancient course of the Sabarmati river on the trade route between Harappan cities in Sindh and the peninsula of Saurashtra.
- Lothal was a vital and thriving trade Centre in ancient times, with its trade of beads, gems, and valuable ornaments reaching the far corners of West Asia and Africa.
- The techniques and tools they pioneered for bead-making and in metallurgy have stood the test of time for over 4000 years.
- The Lothal site has been nominated as a UNESCO World Heritage Site, and its application is pending on the tentative list of UNESCO.
Answer this question from CSP 2019 in the comment box:
Q. Which one of the following is not a Harappan site?
(a) Chanhudaro
(b) Kot Diji
(c) Sohgaura
(d) Desalpur
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Neutrinos
Mains level: NA
Indian scientists have shown that the geometry of space-time can cause neutrinos to oscillate.
What are Neutrinos?
- A neutrino is a subatomic particle that is very similar to an electron but has no electrical charge and a very small mass, which might even be zero.
- Since neutrinos are electrically neutral, they are not affected by the electromagnetic forces which act on electrons. Hence, they are also called Ghost Particles.
- Neutrinos are affected only by a “weak” sub-atomic force of a much shorter range than electromagnetism and are therefore able to pass through great distances in matter without being affected by it.
- They are also one of the most abundant particles in the universe. As they have very little interaction with matter, however, they are incredibly difficult to detect.
Answer this PYQ in the comment box:
Q.The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
(a) Gravity is the strongest of the four
(b) Electromagnetism act only on particles with an electric charge
(c) Weak nuclear force causes radioactivity
(d) Strong nuclear force holds protons and neutrons inside the nuclear of an atom
Finding of the new research
- Neutrinos are mysterious particles, produced copiously in nuclear reactions in the Sun, stars, and elsewhere.
- They “oscillate”- meaning that different types of neutrinos change into one another – as has been found in many experiments.
- Probing of oscillations of neutrinos and their relations with mass are crucial in studying the origin of the universe.
- Neutrinos interact very weakly with everything else – trillions of them pass through every human being every second without anyone noticing.
- A neutrino’s spin always points in the opposite direction of its motion, and until a few years ago, neutrinos were believed to be massless.
What makes this possible?
- The geometry of space-time can cause neutrino oscillations through quantum effects even if neutrinos are massless.
- Einstein’s theory of general relativity says that gravitation is the manifestation of space-time curvature.
- Neutrinos, electrons, protons and other particles which are in the category of fermions show a certain peculiarity when they move in presence of gravity.
- Space-time induces a quantum force in addition to gravity between every two fermions.
- This force can depend on the spin of the particles and causes massless neutrinos to appear massive when they pass through matter, like the Sun’s corona or the Earth’s atmosphere.
- Something similar happens for electroweak interactions, and together with the geometrically induced mass, it is enough to cause oscillation of neutrinos.
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From UPSC perspective, the following things are important :
Prelims level: Silverline Project
Mains level: Not Much
Last week, the Kerala cabinet gave the green light to begin acquiring land for SilverLine, its flagship semi high-speed railway project.
What is the SilverLine project?
- The SilverLine Project entails building a semi high-speed railway corridor through the state linking its southern end and state capital Thiruvananthapuram with its northern end of Kasaragod.
- It is billed as one of the biggest infrastructure enterprises being pushed by the ruling Left government.
- The line is proposed to be 529.45 km long, covering 11 districts through 11 stations.
- When the project is realized, one can travel from Kasaragod to Thiruvananthapuram in less than four hours on trains traveling at 200 km/hr.
- The current travel time on the existing Indian Railways network is 12 hours.
- The project is executed by the Kerala Rail Development Corporation Limited (KRDCL), a joint venture between the Kerala government and the Union Ministry of Railways.
What was the need for the project?
- It has long been argued by urban policy experts that the existing railway infrastructure in the state cannot meet the demands of the future.
- Most trains run with an average speed of 45 km/hr due to a lot of curves and bends on the existing stretch.
- The government claims the SilverLine project is the need of the hour as it can take a significant load of traffic off the existing railway stretch and make travel easier and faster for commuters.
- This will in turn reduce the congestion on roads and help reduce accidents and fatalities.
Issues with the Project
- The unofficial deadline for the project is 2025 but many would say it’s not a realistic target, given the laborious nature of land acquisition in a highly densely populated state like Kerala.
- Acquiring land, especially from private players, in urban areas remains the key challenge for the project.
- There’s also significant opposition to the project by environmentalists citing potential damage to the state’s ecosystem in the path of the proposed route.
- They fear irreversible impact to the state’s rivers, paddy fields, and wetlands, triggering floods and landslides in the future.
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From UPSC perspective, the following things are important :
Prelims level: Precision Iodine Value Analyzer
Mains level: Not Much
The Council of Scientific and Industrial Research-Central Scientific Instruments Organization (CSIR-CSIO) has developed and transferred the technology of Precision Iodine Value Analyzer (PIVA).
What is Precision Iodine Value Analyzer?
- It is an instrument for the measurement of the degree of unsaturation (iodine value) in vegetable oils.
- This indigenous food testing equipment was recognized by the Food Safety and Standards Authority of India (FSSAI) on World Food Safety Day on June 7, 2021.
- It has applications in oil extraction units, quality control and assurance labs, food regulatory authorities, soaps and cosmetics, bakeries, meat industry, paint industry, biodiesel analysis, and charcoal industry.
- It is also useful in determining adulteration in edible oils and fats.
Measuring iodine value
- Iodine value is conventionally determined using manual titration and a few analytical instruments based on automated titration.
- However, these methods take a longer time to analyze, are costly, and use toxic chemicals.
- Researchers at CSIR-CSIO developed a rapid analysis technique that takes just three minutes to carry out the same analysis.
- Currently, PIVA has been calibrated and tested for coconut, sunflower, mustard, palm, rice bran, soybean, groundnut, olive oil, and ghee.
- This new development is a part of the ongoing effort to strengthen the food testing capabilities by introducing quick and advanced food testing kits.
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From UPSC perspective, the following things are important :
Prelims level: New Shephard
Mains level: Space tourism
Last week, Amazon founder and billionaire Jeff Bezos’s space company called Blue Origin concluded the online auction for the first seat on New Shephard, a rocket system meant to take tourists to space.
What is New Shephard?
- New Shephard has been named after astronaut Alan Shephard – the first American to go to space – and offers flights to space over 100 km above the Earth and accommodation for payloads.
- Essentially, it is a rocket system that has been designed to take astronauts and research payloads past the Karman line – the internationally recognized boundary of space.
- The idea is to provide easier and more cost-effective access to space meant for purposes such as academic research, corporate technology development, and entrepreneurial ventures among others.
- Apart from its academic and research-oriented goal, New Shephard will also allow space tourists to experience microgravity by taking them 100 km above the Earth.
Its components
- The rocket system consists of two parts, the cabin or capsule, and the rocket or the booster.
- The cabin can accommodate experiments from small Mini Payloads up to 100 kg.
- As per Blue Origin, the Mini Payloads provide easier space access to students, who are part of educational institutions that are developing their own space programs.
- Further, the cabin is designed for six people and sits atop a 60 feet tall rocket and separates from it before crossing the Karman line, after which both vehicles fall back to the Earth.
- All the six seats in the capsule are meant for passengers, each of whom gets their own window seat. The capsule is fully autonomous and does not require a pilot.
How does it work?
- The system is a fully reusable, vertical takeoff and vertical landing space vehicle that accelerates for about 2.5 minutes before the engine cuts off.
- After separating from the booster, the capsule free falls in space, while the booster performs an autonomously controlled vertical landing back to Earth.
- The capsule, on the other hand, lands back with the help of parachutes.
A boost for space tourism
- Space tourism seeks to give laypeople the ability to go to space for recreational, leisure, or business purposes.
- The idea is to make space more accessible to those individuals who are not astronauts and want to go to space for non-scientific purposes.
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From UPSC perspective, the following things are important :
Prelims level: Northern Limit of Monsoon (NLM)
Mains level: Indian Monsoon
The Northern Limit of Monsoon (NLM) continues to pass through Diu, Surat, Nandurbar, Bhopal, Nowgong, Hamirpur, Barabanki, Bareilly, Saharanpur, Ambala & Amritsar.
Try this question from CS Mains 2017:
Q.What characteristics can be assigned to monsoon climate that succeeds in feeding more than 50 percent of the won population residing in Monsoon Asia?
What is the Northern Limit of Monsoon?
- NLM, is the northernmost boundary of India up to which monsoon rains have advanced on any given day.
- So, it is a way of tracking the progress of monsoon clouds as they move over India’s landmass.
- The India Meteorological Department (IMD) adds that the monsoon “advances northwards, usually in surges, and covers the entire country around July 15″.
What are the Eastern and Western Arms?
- It is the mountains of southern India that split the south-western winds, giving the Indian monsoon its ‘two arms.
- The western arm of the monsoon is deflected northwards, by the Western Ghats, to (Mumbai) and then on to Pakistan.
- The eastern arm travels up through the Bay of Bengal to (Kolkata) and Assam and is deflected north-westwards by the Himalayas.
Also refer this link:
Explain the formation of Indian monsoons. Highlight the link between monsoons and India’s cropping pattern. (15 marks)
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Edible Oil imports of India
Mains level: NA
The Food Safety and Standards Authority of India had decided this on March 31. This would end the practice to add other edible oil (like palms, rice bran, etc) to mustard oil.
Why such move?
- This is good news for mustard farmers whose fortunes were adversely hit as up to a fifth of mustard oil volume could earlier be blends of other oils.
- But why did India start the practice in the first place? And how has it affected consumer health?
Answer this question from CSP 2018:
Q.Consider the following statements:
- The quantity of imported edible oils is more than the domestic production of edible oils in the last five years.
- The Government does not impose any customs duty on all the imported edible oils as a special case.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Why did the blending begin?
- The Union health ministry had allowed blending in edible vegetable oil in a notification in 1990.
- In 1998, Delhi and other north Indian states witnessed the dropsy epidemic — a disease that caused swelling in the body due to the build-up of fluid in tissues.
- At least 60 people died and 3,000 were hospitalized in the national capital.
- Researchers believed the consumption of mustard oil caused the disease.
Adulteration is hazardous
- Upon investigation, it was found to be adulterated with Argemone Mexicana, a kind of weed that grows with yellow flowers.
- The adulteration, however, was highly suspicious: While mustard is a rabi crop that is cultivated in the winters, Argemone Mexicana grows in April-May.
- This meant that the possibility of mixing mustard seeds with that Argemone mexicana was rare.
- The suspicious adulteration stoked fear among the masses. It started a campaign against the consumption of oil.
- Several studies have found mustard oil unsafe for consumption.
The 1990 decision
- Experts have claimed that the blending of mustard oil was not only dangerous to health but also adversely impacted mustard farming.
- Some groups have also flagged the blending of refined oil.
- Following the Union health ministry’s 1990 notification allowing for the blending of edible vegetable oil, the FSSAI rolled out regulations in the regard in 2006.
- Producers and other companies involved in blending were regularised through the Agriculture Produce (Grading and Marking) Act (AGMARK).
- It also made it mandatory to write the kind of oil used for blending over the packet.
- The companies involved in blending strongly advocated for the cause, despite reports about its excess and unregulated use. The governments over the years have been tight-lipped about it.
Has blending led to dependence over the import of oil?
- In 1990-91, India was self-reliant in mustard oil production and produced 98 percent of the oil needed.
- Blending mustard oil with other edible oils considered to bolster nutritional profile, taste, and quality.
- Despite the harmful effects, the processing industry took advantage of blending.
- Cheap palm oil would be blended up to 80 percent in mustard oil sometimes.
- As a result, profits of mustard farmers dried up, which discouraged them from cultivating the crop.
- This could be one of the reasons behind India’s increasing dependency on oil imports over the last two decades.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: PASIPHAE
Mains level: Theory of expansion of the universe
The development of a vital instrument PASIPHAE, which will be used in upcoming sky surveys to study stars, is being led by an Indian astronomer.
What is PASIPHAE?
- PASIPHAE stands for Polar-Areas Stellar-Imaging in Polarisation High-Accuracy Experiment.
- It is an international collaborative sky surveying project. Scientists aim to study the polarisation in the light coming from millions of stars.
- The name is inspired by Pasiphae, the daughter of Greek Sun God Helios.
- The survey will use two high-tech optical polarimeters to observe the northern and southern skies, simultaneously.
- It will focus on capturing starlight polarisation of very faint stars that are so far away that polarisation signals from there have not been systematically studied.
- By combining the data, astronomers will perform a maiden magnetic field tomography mapping of the interstellar medium of very large areas of the sky using a novel polarimeter instrument known as WALOP.
Why is PASIPHAE important?
- Since its birth about 14 billion years ago, the universe has been constantly expanding, as evidenced by the presence of Cosmic Microwave Background (CMB) radiation which fills the universe.
- Immediately after its birth, the universe went through a short inflationary phase during which it expanded at a very high rate before it slowed down and reached the current rate.
- However, so far, there have only been theories and indirect evidence of expansion associated with the early universe.
- A definitive consequence of the inflationary phase is that a tiny fraction of the CMB radiation should have its imprints in the form of a specific kind of polarisation (known scientifically as a B-mode signal).
- All previous attempts to detect this signal met with failure mainly due to the difficulty posed by our galaxy, the Milky Way, which emits copious amounts of polarized radiation.
- Besides, it contains a lot of dust clouds that are present in the form of clusters. When starlight passes through these dust clouds, they get scattered and polarized.
What will PASIPHAE do?
- The PASIPHAE survey will measure starlight polarisation over large areas of the sky.
- This data along with distances to the stars will help create a 3-Dimensional model of the distribution of the dust and magnetic field structure of the galaxy.
- Such data can help remove the galactic polarized foreground light and enable astronomers to look for the elusive B-mode signal.
What is WALOP?
- Wide Area Linear Optical Polarimeter (WALOP) is an instrument when mounted on two small optical telescopes, that will be used to detect polarized light signals emerging from the stars along high galactic latitudes.
- The images will simultaneously have the finest of details of a star along with its panoramic background.
- WALOP will operate on the principle that at any given time, the data from a portion of the sky under observation will be split into four different channels.
- Depending on the manner in which light passes through the four channels, the polarisation value from the star is obtained.
- That is, each star will have four corresponding images which when stitched together will help calculate the desired polarisation value of a star.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: EnVision Mission
Mains level: Interplanetary missions
Following NASA’s footsteps, the European Space Agency (ESA) announced that it has selected EnVision as its next orbiter that will visit Venus sometime in the 2030s.
Last week, NASA selected two missions to the planet Venus, Earth’s nearest neighbour. The missions called DAVINCI+ and VERITAS have been selected based on their potential for scientific value and the feasibility of their development plans.
What is EnVision?
- EnVision is an ESA-led mission with contributions from NASA. It is likely to be launched sometime in the 2030s.
- The earliest launch opportunity for EnVision is 2031, followed by 2032 and 2033.
- Once launched on an Ariane 6 rocket, the spacecraft will take about 15 months to reach Venus and will take 16 more months to achieve orbit circularization.
- The spacecraft will carry a range of instruments to study the planet’s atmosphere and surface, monitor trace gases in the atmosphere and analyses its surface composition.
What are other such missions?
- EnVision will follow another ESA-led mission to Venus called ‘Venus Express’ (2005-2014) that focused on atmospheric research and pointed to volcanic hotspots on the planet’s surface.
- Other than this, Japan’s Akatsuki spacecraft has also been studying the planet’s atmosphere since 2015.
Why are scientists interested in studying Venus?
- At the core of the ESA’s mission is the question of how Earth and Venus evolved so differently from each other considering that they are roughly of the same size and composition.
- Venus is the hottest planet in the solar system because of the heat that is trapped by its thick cloud cover.
- Last year, a team of scientists reported that they had found phosphine gas (a chemical produced only through biological processes) in the atmosphere of Venus.
- This triggered excitement in the scientific community that some life forms might be supported by the planet.
- But the existence of life on the planet is nearly impossible given the high temperatures of Venus and its acidic atmosphere.
Back2Basics: Venus Planet
- For those on Earth, Venus is the second-brightest object in the sky after the moon.
- It appears bright because of its thick cloud cover that reflects and scatters light.
- But while Venus, which is the second closest planet to the Sun, is called the Earth’s twin because of their similar sizes, the two planets have significant differences between them.
- For one, the planet’s thick atmosphere traps heat and is the reason that it is the hottest planet in the solar system, despite coming after Mercury, the closest planet to the Sun.
- Surface temperatures on Venus can go up to 471 degrees Celsius, which is hot enough to melt lead.
- Further, Venus moves forward on its orbit around the Sun but spins backwards around its axis slowly.
- This means on Venus the Sun rises in the west and sets in the East.
- One day on Venus is equivalent to 243 Earth days because of its backward spinning, opposite to that of the Earth’s and most other planets.
- Venus also does not have a moon and no rings.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Content delivery network (CDN)
Mains level: Need for data localization
Several big websites around the world went down for about half an hour because of a major issue with the content delivery network (CDN) of American cloud computing services provider Fastly.
Global internet outage: Which websites were affected?
- com, Reddit, Twitch, Spotify, Pinterest, Stack Overflow, GitHub, gov.uk, Hulu, HBO Max, Quora, PayPal, Vimeo and Shopify are some of the big names.
- Prominent news websites impacted were the Financial Times, the Guardian, the New York Times, CNN, and Verge, to name some.
- Most users would have seen a 503 error when trying to access these websites, indicating that the browser was not able to access the server.
What is Fastly?
- Fastly is a cloud computing services provider, which offers CDN, edge computing, cloud storage services.
- All of its geographies, including the three stations it has in India — Chennai, Mumbai and New Delhi — were suffering from “Degraded Performance”.
Answer this PYQ from CSP 2018:
Q.The terms ‘WannaCry, Petya, Eternal Blue’ sometimes mentioned news recently are related to
(a) Exoplanets
(b) Crypto currency
(c) Cyber attacks
(d) Mini satellites
What is a CDN?
- A CDN refers to a geographically distributed group of servers that work together to provide fast delivery of Internet content.
- They house content close to the telecom service providers’ networks.
- Majority of web traffic across the world today is routed through CDNs.
- Platforms such as Netflix, Facebook, Amazon — ones with large quantities of data held in global libraries — host their geographically relevant content closer to where that content is to be consumed.
- This ensures the end customer is able to access the content faster.
- Another reason companies rely on these CDNs is to help protect their sites against traffic spikes, distributed denial of service (DDOS) attacks, etc.
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