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- Wed Mar 24, 2010 1:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Galaxy Wars: M81 versus M82 (2010 Mar 24)
- Replies: 15
- Views: 3365
Re: APOD: Galaxy Wars: M81 versus M82 (2010 Mar 24)
FROM TODAY'S APOD: "The gravity from each galaxy dramatically affects the other during each hundred million-year pass. Last go-round, M82 's gravity likely raised density waves rippling around M81 , resulting in the richness of M81 's spiral arms. But M81 left M82 with violent star forming regi...