Large rendering of Chandra X-ray Observatory in space.

Chandra X-ray Observatory

X-ray telescopes also must be placed in space, because x-rays can't penetrate Earth's atmosphere. It's a good thing, too, because x-rays are so energetic they would soon kill almost every living thing on Earth. X-rays are made by the hottest events and objects in the Universe. The Chandra X-ray telescope has helped us learn more about black holes, pulsars, quasars, and other exciting cosmic objects.