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- Thu Oct 08, 2009 5:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: A Doubled Ringed Basin in Mercury (2009 Oct 7)
- Replies: 25
- Views: 3668
Re: A Doubled Ringed Basin in Mercury (2009 Oct 7)
I believe these double ringed features could be caused by a double strike. Most likely a fragmented comet like Levy-Shoemaker 9. The rarity of these is due to the fact that the trajectory would need to be essentially straight in, which should be very uncommon, but not impossible. The smoothness of t...