eli5: NASA has a telescope that can see the creation of stars and planets billions of years ago, how? Link is in description

Question

[Telescope](https://www.reddit.com/r/interestingasfuck/comments/ke2p2r/nasa_is_about_to_launch_a_telescope_that_can/?utm_source=share&utm_medium=ios_app&utm_name=iossmf)

In: Technology

Answer 1

The light they see is billions of years old, therefore when they see a planet they are seeing a billions of years old picture. If we we’re on another plant that far away we would see dinosaurs.