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- Mon Sep 15, 2014 1:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Supernova Remnant Puppis A (2014 Sep 12)
- Replies: 30
- Views: 68371
Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
how far does " nearby " have to be to not be " nearby " anymore ? Well, that depends. Since the approximate radius of the Milky Way is about 50,000 light-years, a supernova 7,000 light-years away is pretty nearby. Ann I thought the radius of the Milky Way was approximately 100,0...