The primary mirror of the JWST is made of beryllium because it is lightweight, strong, and has a low coefficient of thermal expansion.

The JWST's primary mirror is 6.5 meters in diameter, which is larger than the Hubble Space Telescope's primary mirror, which is 2.4 meters in diameter.

The JWST is expected to have a lifetime of 10 years, although it could be extended if it is successful.

The JWST's primary mission is to study the early universe, search for exoplanets, and study the formation of stars and galaxies.

The JWST's cost is estimated to be $10 billion.

The JWST is scheduled to launch in 2023.

The JWST will be located at Lagrange point 2, which is a point in space about 1.5 million kilometers from Earth.

The JWST's scientific instruments include the Near-Infrared Camera (NIRCam), the Mid-Infrared Instrument (MIRI), and the Near-Infrared Spectrograph (NIRSpec).

The JWST is expected to make a number of scientific discoveries, including the first stars and galaxies in the universe, exoplanets that could support life, and the formation of stars and planets.

The JWST will benefit humanity by helping us understand our place in the universe, search for life beyond Earth, and understand the formation of stars and planets.

The JWST faces a number of challenges, including its large size and weight, its complex design, and its high cost.

The JWST is being funded by NASA, the European Space Agency, and the Canadian Space Agency.

John Mather is the principal investigator for the JWST.

The JWST will be launched by an Ariane 5 rocket.

The JWST is expected to have a major impact on astronomy, revolutionizing our understanding of the universe, helping us answer some of the biggest questions in astronomy, and inspiring a new generation of scientists and engineers.