Note4Students
From UPSC perspective, the following things are important :
Prelims level: Arecibo Radio Telescope
Mains level: Not Much
A massive radio telescope at Puerto Rico’s Arecibo Observatory — one of the world’s largest — collapsed on after sustaining severe damage, following 57 years of astronomical discoveries.
Try this PYQ:
Which of the following is/are cited by the scientists as evidence/evidence for the continued expansion of the universe?
- Detection of microwaves in space
- Observation of redshirt phenomenon in space
- Movement of asteroids in space
- Occurrence of supernova explosions in space
Codes:
(a) 1 and 2 only
(b) 2 only
(c) 1, 3 and 4
(d) None of the above can be cited as evidence.
Arecibo Telescope
- The Arecibo Observatory, also known as the National Astronomy and Ionosphere Center (NAIC), was an observatory in Arecibo, Puerto Rico owned by the US National Science Foundation (NSF).
- It was the world’s largest single-aperture telescope for 53 years, surpassed in July 2016 by the Five-hundred-meter Aperture Spherical Telescope (FAST) in China.
- The second-largest single-dish radio telescope in the world, it had withstood many hurricanes and earthquakes since it was first built in 1963.
Its contributions
- Being the most powerful radar, scientists employed Arecibo to observe planets, asteroids and the ionosphere.
- It made several discoveries over the decades, including finding prebiotic molecules in distant galaxies, the first exoplanets, and the first millisecond pulsar.
- In 1967, Arecibo was able to discover that the planet Mercury rotates in 59 days and not 88 days as had been originally thought.
- In the following decades, it also served as a hub in the search for extraterrestrial life, and would look for radio signals from alien civilizations.
- In 1993, scientists Russell Hulse and Joseph Taylor were awarded the Nobel Prize in Physics for their work on the observatory in monitoring a binary pulsar.
- It provided a strict test of Einstein’s Theory of General Relativity and the first evidence for the existence of gravitational waves.
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