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The sky is filled with warm, fuzzy gas

26 Apr 2017, 12:45 UTC
The sky is filled with warm, fuzzy gas WHAM Collaboration, UW–Madison, Space Science Institute & National Science Foundation

One of my favorite things is to learn something new. Especially when it’s something big. In this case, I mean it literally: The galaxy is filled with warm, ionized hydrogen gas, it forms a huge pancake-like structure 75,000 light years across and more than 6000 light years thick, and it has a name: the Reynolds layer. Even better, when it was discovered, it was a shock, briefly defying explanation until better physical models of the galaxy made it more clear.

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