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Q&A How to verify correctness of a galaxy map?

I'm trying to imagine mystery setting when amateur astronomer stumbles upon a torrent which contains a 3D map of the Milky Way galaxy. The map contains all large objects: star systems, planets, ne...

6 answers  ·  posted 8y ago by GallPeters‭  ·  last activity 8y ago by GallPeters‭

Question astronomy reality-check