Almost all the components on the dark side of the telescope will cool down before the world's largest flying observatory begins observing the universe.
This marks the beginning of the aligning process of the 18 mirrors to direct light onto one to observe the infrared light coming from distant worlds, galaxies.
With the telescope now placed in its intended orbit nearly 15,00,000 kilometers away from Earth, the next major step is to turn off instrument heaters.
Webb is designed to peer back over 13.5 billion years to capture infrared light from celestial objects, with much higher resolution than ever before, and to study our own solar system as well as distant worlds.