James Webb Space Telescope
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The James Webb Space Telescope (JWST) is a space telescope that is designed to conduct infrared astronomy. It is the largest optical telescope in space that greatly improved infrared resolution and sensitivity allows it to view objects distant and too old or faint for the Hubble space telescope. The JWST mission is expected to enable a broad range of investigations across the fields of cosmology and astronomy, such as the formation of the first galaxies and observation of the first stars and detailed atmospheric characterization of potentially habitable exoplanets.
The JWST’s development is led by U.S National Aeronautics and Space Administration (NASA) in collaboration with the European Space Agency (ESA) and the Canadian Space Agency (CSA). JWST was launched in December 2021
and arrived at the Sun-Earth Lagrange point in January 2022. As of July 2022, JWST succeeded Hubble as NASA’s flagship mission in astrophysics. On 11 July 2022 Monday, U.S President Joe Biden released one of the JWST’s first images in a preview to the public via a press conference.
Features
The mass of the James Webb Space Telescope is about half of Hubble Space Telescope’s mass. The JWST has a 21 ft diameter gold-coated beryllium primary mirror, which is made up of 18 separate hexagonal mirrors. The mirror has a polished area of 283 sq ft. it is over six times larger than the collecting area of Hubble’s 7.9 ft diameter mirror, which has a collecting area of 43 sq ft. The JWST’s mirror has a gold coating to provide infrared reflectivity, which is covered by a thin layer of glass for durability.
JWST also observes nearby objects, including objects in the solar system and having an apparent angular rate of motion of 0.030 arc seconds per second or less. This includes comets, and asteroids beyond Earth’s orbit, all planets and satellites, and “virtually all” known Kuiper Belt Objects. It can also observe unplanned and opportunistic targets within 48 hours of a decision to do so, such as gamma ray bursts and supernovae
Webb’s first deep field
Webb’s First Deep Field is the first operational image taken by the JWST, which depicts SMACS 0723, a galaxy cluster 4.6 light years from Earth in the constellation volans. The composite image was taken by the telescope’s Near infrared camera (NIRCam). It covers a tiny area of sky visible from the Southern Hemisphere. In the image, thousands of galaxies are visible, which is the highest-resolution image of the early universe ever taken.
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James Webb Space Telescope
JWST was launched in December 2021
It is the first operational image taken by the JWST
The JWST’s development is led by U.S National Aeronautics and Space Administration (NASA) in collaboration with the European Space Agency (ESA) and the Canadian Space Agency (CSA)
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