Context:
Nasa’s Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) has concluded its mission, marking the end of a journey spanned over a decade.
Relevance:
Facts for Prelims
NEOWISE Telescope:
- Originally launched by NASA in 2009 as the Wide-Field Infrared Survey Explorer (WISE), it was intended for infrared astronomical observations, focusing on asteroids, stars, and distant galaxies.
- Its initial mission concluded in February 2011 after achieving its objectives.
- In December 2013, the telescope was reactivated from hibernation and repurposed under the NEOWISE project to study near-Earth objects (NEOs) and other celestial bodies.
Adjustments and Discoveries:
- Orbital Adjustments: Initially orbiting at 310 miles, NEOWISE is currently positioned about 217 miles above Earth’s surface due to increased solar activity impacting its orbit.
- Scientific Achievements: During its initial mission, it identified over 158,000 minor planets, including 34,000 that were previously unknown.
Impact of NEOWISE Data:
- Contributions to Astronomy: The data collected by NEOWISE has been critical in determining the quantity, trajectory, size, and composition of various asteroids within our solar system.
- Notable Discoveries: This included the first identification of an Earth Trojan asteroid, expanding our understanding of near-Earth objects.
-Source: Indian Express
