What is the Webb telescope?

The James Webb Space Telescope (JWST) is an infrared observation space telescope jointly developed by NASA, the European Space Agency and the Canadian Aeronautics and Space Administration. It is a member of the Hubble Space Telescope. Successor?[1]?.

The James Webb Space Telescope has a mass of 6.2 tons, about half that of the Hubble Space Telescope (11 tons). The main reflector is made of beryllium, has a diameter of 6.5 meters, and an area more than five times that of the Hubble Space Telescope. It can also work in the near-infrared band and operate in an environment close to absolute zero (equivalent to minus 273.15 degrees Celsius). ?[15]?

On December 22, 2021 local time, NASA stated that due to severe weather conditions at the European Spaceport in French Guiana, the Webb Space Telescope was originally scheduled to be launched on December 24 Flight VA256 was postponed, with a new launch date of December 25th. ?[16]?

At 13:15 French local time on December 25, 2021 (20:15 Beijing time on the 25th), NASA's James Webb Space Telescope was in French Guiana The Lu base was successfully launched into space. ?[17-19]?

At around 0:00 on January 9th, Beijing time, the James Webb Space Telescope successfully completed the deployment of the last part of the main reflector and completed the locking.

Reference: Webb Telescope