The James Webb Space Telescope is a space telescope that will be the successor to the Hubble Space Telescope. The JWST will provide greatly improved resolution and sensitivity over the Hubble, and will enable a broad range of investigations across the fields of astronomy and cosmology.

Launch date: March 30, 2021

Cost: 10 billion USD (2016)

Wavelengths: from 0.6 µm (orange); to 28.5 µm (mid-infrared)

Focal length: 131.4 m (431 ft)

Diameter: 6.5 m (21 ft)

Did you know: The mirror on James Webb Space Telescope will be made of beryllium, which is lightweight yet strong, and can withstand very cold temperatures.