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Dark matter and dark energy.

Stories tagged #Dark matter and dark energy

The UniverseExplainer

What Is Dark Matter?

Galaxies spin too fast and light bends too much, so something unseen seems to be out there, but nobody yet knows what it is.

Open question6 min read

The UniverseExplainer

What Is Dark Energy?

In 1998 astronomers found that the universe's expansion is speeding up, and "dark energy" is the name for a cause nobody yet understands.

Open question6 min read

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