SpazeSpace telescope at Sun–Earth L2
James Webb Space Telescope
The largest telescope in space. Its 6.5-metre gold mirror sees in infrared, from 1.5 million km beyond Earth, behind a sunshield the size of a tennis court.
- Launched
- 25 Dec 2021
- Mirror
- 6.5 m, 18 segments
- Sunshield
- 21 × 14 m
- Coldest part
- −266 °C
Air on board
- None, it’s a vacuum
Gold-coated beryllium mirrors behind a five-layer sunshield
Measured by NASA