James Webb Space Telescope (JWST) is a telescope that will be put into space.
 It is planned to be launched in 2021.
 It is a replacement for the Hubble Space Telescope which was launched in 1990.

The telescope is named after James E. Webb, who was a director at NASA and created the Apollo program that put astronauts on the moon.

It will have a main mirror that is 6.5 metres (21 feet) wide.
This is 6 times larger in area than Hubble.
It is so large it is made in 18 pieces that fold together during the launch, so that it can fit into a rocket.
It is mainly an infrared telescope but also works in the red part of the visible light (the pictures will be coded with false color so we can see them).
It is plated with gold because gold reflects  infrared very well.
It will be able to see things that the Hubble Space Telescope cannot.
Infrared vision can be used to see heat radiation (like some kinds of night vision goggles), so the telescope itself must be kept as cool as possible.
It is protected by a large sunshield the size of a tennis court to keep it cool and dark.
James Webb Space Telescope (JWST) is a telescope that will be put into space.  It is planned to be launched in 2021.  It is a replacement for the Hubble Space Telescope which was launched in 1990. 
The telescope is named after James E. Webb, who was a director at NASA and created the Apollo program that put astronauts on the moon.
It will have a main mirror that is 6.5 metres (21 feet) wide. This is 6 times larger in area than Hubble. It is so large it is made in 18 pieces that fold together during the launch, so that it can fit into a rocket. It is mainly an infrared telescope but also works in the red part of the visible light (the pictures will be coded with false color so we can see them). It is plated with gold because gold reflects  infrared very well. It will be able to see things that the Hubble Space Telescope cannot. Infrared vision can be used to see heat radiation (like some kinds of night vision goggles), so the telescope itself must be kept as cool as possible. It is protected by a large sunshield the size of a tennis court to keep it cool and dark.
James Webb Space Telescope