Learn About Light

Light is all around us and takes many forms. The human eye can detect just a small fraction of light. The Universe gives off all types of light, and we must use sophisticated telescopes and observatories to see what would otherwise be invisible to us.

With its unparalleled X-ray vision, the Chandra X-ray Observatory is one of the important tools that scientists use to learn about the cosmos through light. Chandra provides invaluable insight into everything from exploded stars to black holes to galaxies and the clusters they inhabit. In fact, using X-ray light from Chandra, scientists are even learning about mysteries — dark matter and dark energy — that emit no light at all.

The video with closed-captions (at YouTube)

The Milky Way