Hubble and the James Webb Space Telescope operate in different wavelengths. That means that they can see different aspects of the same objects.
It might not seem obvious why astronomers need multiple different powerful space telescopes. Surely a more powerful telescope is better than a less powerful one? So why are there multiple different telescopes in orbit, either around Earth or around the sun?
The answer is to do with two main factors. One is the telescope’s field of view, meaning how much of the sky it looks at. Some telescopes are useful for looking at large areas of the sky in less detail, working as survey telescopes to identify objects for further research or to look at the universe on a large scale — like the recently launched Euclid mission.
