Why in News:
- The James Webb Space Telescope has spotted its first star.
- The first picture sent back of the cosmos is far from stunning: 18 blurry white dots on a black background, all showing the same object: HD 84406 a bright, isolated star in the constellation Ursa Major.
- NASA’s James Webb Space Telescope was launched, opening a new era of astronomy.
- The telescope is an international collaboration led by NASA in partnership with the European and Canadian space agencies.
- Ultraviolet and visible light emitted by the very first luminous objects has been stretched or “redshifted” by the universe’s continual expansion and arrives today as infrared light. Webb is designed to see this infrared light with unprecedented resolution and sensitivity.
- Webb will be a powerful tool for studying the nearby universe.
- Scientists will use Webb to study planets and other bodies in our solar system to determine their origin and evolution and compare them with exoplanets, planets that orbit other stars.
- Webb will also observe exoplanets located in their stars’ habitable zones, the regions where a planet could harbor liquid water on its surface, and can determine if and where signatures of habitability may be present.
- Using a technique called transmission spectroscopy, the observatory will examine starlight filtered through planetary atmospheres to learn about their chemical compositions.
- Webb is about 100 times more sensitive than Hubble and is expected to transform scientists’ understanding of the universe and our place in it.
- JWST is much more powerful and has the ability to look in the infrared spectrum, which will allow it to peer through much deeper into the universe, and see through obstructions such as gas clouds.
- Ursa Major constellation lies in the northern sky. Its name means “the great bear,” or “the larger bear”. The smaller bear is represented by Ursa Minor.
- To read more about JWST: https://officerspulse.com/james-webb-space-telescope-jwst/
- To attend mains mock question: https://officerspulse.com/how-is-james-webb-space-telescope-significant-in-advancement-of-space-research/