What is James Webb space telescope| How James webb Space Telescope work

What is Webb space telescope

The James Webb Space Telescope (JWST) is a large, powerful space telescope that is set to launch in 2021. It is named after James E. Webb, who served as the second administrator of NASA from 1961 to 1968.

The JWST is designed to be the successor to the Hubble Space Telescope and will be the largest and most complex space telescope ever built. It is a collaboration between NASA, the European Space Agency (ESA), and the Canadian Space Agency (CSA). The primary mission of the JWST is to observe the universe in the infrared part of the spectrum, which will allow it to see through dust clouds and study the formation and evolution of galaxies, stars, and planetary systems.

The JWST will be located at a point in space called the second Lagrange point (L2), which is about 1.5 million kilometers (930,000 miles) from Earth. From this vantage point, the telescope will have an unobstructed view of the cosmos, and it will be able to make observations that are impossible from Earth's surface or from other space telescopes. The JWST is expected to revolutionize our understanding of the universe and make many groundbreaking discoveries.

How webb Space Telescope work

The James Webb Space Telescope (JWST) works by using its advanced instruments and telescopic capabilities to observe the universe in the infrared part of the electromagnetic spectrum. It is designed to be highly sensitive and accurate, with a primary mirror that is over six times larger than that of the Hubble Space Telescope.

The JWST has four main scientific instruments that allow it to observe and study different aspects of the universe. These instruments are:

Near-Infrared Camera (NIRCam): This camera can take images and measure the colors of objects in the near-infrared range of the spectrum. It can also detect the faintest and most distant galaxies in the universe.

Near-Infrared Spectrograph (NIRSpec): This instrument is used to measure the spectrum of light from distant objects, which can provide information about the composition and motion of stars and galaxies.

Mid-Infrared Instrument (MIRI): MIRI can observe the mid-infrared part of the spectrum, which allows it to study the formation and evolution of stars and planets.

Fine Guidance Sensor/Near-Infrared Imager and Slitless Spectrograph (FGS/NIRISS): This instrument is used for precision pointing and control of the telescope, and can also take images and spectra in the near-infrared range.

The JWST also has a sunshield, which is made up of five layers of special material that can protect the telescope from the heat and light of the sun. The sunshield is about the size of a tennis court and will keep the telescope and its instruments at very low temperatures to minimize background noise and improve the quality of its observations.

The JWST will be launched into space aboard an Ariane 5 rocket and will be positioned at the second Lagrange point (L2), which is a stable location about 1.5 million kilometers (930,000 miles) from Earth. From this location, the telescope will be able to make observations that are impossible from Earth's surface or from other space telescopes.