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- Tue Mar 27, 2012 12:40 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Unusual Hollows Discovered on Planet... (2012 Mar 27)
- Replies: 12
- Views: 3187
Re: APOD: Unusual Hollows Discovered on Planet... (2012 Mar
A very similar feature in fact exists on the Moon. It is the "Ina Caldera", a weird 3-km-long feature where the lunar regolith apparently has gone missing and that looks remarkably like these features on Mercury. One of the theories for its formation is outgassing. The March 2012 issue of ...