Astronomy
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[(Up)](../../README.md#topics) | _See also: [Physics](../Physics/README.md#physics)_

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### Web resources

[Is the Moon moving away from the Earth? When was this discovered? (Intermediate) - Curious About Astronomy? Ask an Astronomer](https://web.archive.org/web/20220812223333/http://curious.astro.cornell.edu/about-us/37-our-solar-system/the-moon/the-moon-and-the-earth/111-is-the-moon-moving-away-from-the-earth-when-was-this-discovered-intermediate) ★

[APOD: 2013 February 20 - Saturn's Hexagon and Rings](https://apod.nasa.gov/apod/ap130220.html) ★

[How has knowledge of fusion of the Sun changed astronomy?](https://astronomy.stackexchange.com/questions/42105/how-has-knowledge-of-fusion-of-the-sun-changed-astronomy) ★

[Do all galaxies have a blackhole in the center](https://astronomy.stackexchange.com/questions/28012/do-all-galaxies-have-a-blackhole-in-the-center) ★

[What keeps galaxies together?](https://astronomy.stackexchange.com/questions/41722/what-keeps-galaxies-together) ★