Galaxy Shapes in an Attic
Pale Blue Pod
00:00
The Coolest Thing About Dark Matter
A galaxy is a collection of stars, which themselves can be the centers of their own stellar systems. In galaxies you also have a lot of dust left over from various interactions and events throughout the history of space. And very importantly, but very invisibly, we have dark matter. Dark matter is actually, we don't know what it is. It does not interact with light. Light just like does not care about dark matter. They don't realize that each other exists.
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