JAMES WEBB SPACE TELESCOPE

1 Integrated Science Instrument Module

Cameras and science instruments are housed in a module behind the primary mirror.

5 Multilayer Sun shield

Five layers protect the observatory from light, radiation and heat.

2 Primary mirror

18 hexagonal segments made of gold-coated beryllium are used to capture faint infrared light.

6 Solar power array

The array always faces the Sun, allowing sunlight to be converted into electricity.

3 Secondary mirror

This mirror reflects light gathered from the primary mirror into the science instruments.

7 Massive mirror

Each of Webb’s segments measures 1.3 metres (4.2 feet) across – about the size of a coffee table.

4 Trim flap

This ensures that the spacecraft is stabilised.