Thoughts from a Planetarian: Names in Astronomy

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Andromeda Galaxy

Astronomers have a… complicated… relationship with names. Sometimes we get it right. Take the term “gas giants” for example. Jupiter and Saturn are gigantic and (mostly) made of gas. It’s a pretty fantastic name. On the flip side we have planetary nebulae, which, while they are nebulae, don’t produce planets nor do they come from planets. They’re so named because early astronomers thought they looked a little like planets.

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