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The James Webb Space Telescope (JWST) is a space telescope developed by NASA with contributions from the European Space Agency (ESA), and the Canadian Space Agency (CSA). The telescope is named after James E. Webb,who was the administrator of NASA from 1961 to 1968 and played an integral role in the Apollo program.It is intended to succeed the Hubble Space Telescope as NASA's flagship mission in astrophysics.JWST was launched 25 December 2021 on Ariane flight VA256. It is designed to provide improved infrared resolution and sensitivity over Hubble, viewing objects up to 100 times fainter and will enable a broad range of investigations across the fields of astronomy and cosmology, including observations up to redshift z≈20 of some of the most distant events and objects in the Universe such as the formation of the first galaxies, and allowing detailed atmospheric characterization of potentially habitable exoplanets.
JWST's primary mirror, the Optical Telescope Element, consists of 18 hexagonal mirror segments made of gold-plated beryllium which combine to create a 6.5 meter (21 ft 4 inch) diameter mirror. This gives Webb's telescope a light collecting area about 5.6 times larger than Hubble's 2.4 m (7.9 ft) mirror (25.37 m2 collecting area to Hubble's 4.525 m2). Unlike Hubble, which observes in the near ultraviolet, visible, and near infrared (0.1-1.0 μm) spectra, JWST will observe in a lower frequency range, from long-wavelength visible light (red) through mid-infrared (0.6-28.3 μm). This will enable it to observe high-redshift objects that are too old and too distant for Hubble.The telescope must be kept below 50 K (−223 °C; −370 °F) to observe faint signals in the infrared without interference from any other sources of warmth, so it will be deployed in space near the Sun-Earth L2 Lagrange point, a point in space about 1.5 million kilometers (930,000 mi) from Earth, where its 5 layer kite-shaped sunshield can protect it from warming by the Sun, Earth and Moon at the same time.
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Негізгі бет জেমস ওয়েবের কার্যপদ্ধতি James Webb Space Telescope (JWST) explained in bangla with animation Ep 58
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