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- Wed Oct 26, 2005 3:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: 4,500 Kilometers Above Dione
- Replies: 16
- Views: 5007
impact + sinkhole?
If Dione's made of ice -- or at least, has an icy covering -- then perhaps whatever it was that slammed into the surface had not only sufficient kinetic energy in it to leave a crater but also heat energy which then melted the surrounding ice as it went into the surface, leaving those fresh white wa...