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Sort of looks like two rocks mashed together, but without quite enough mass to really round out. I'm sure that's totally wrong but still neat to see.
by endofcapital 8y ago
Sort of looks like two rocks mashed together, but without quite enough mass to really round out. I'm sure that's totally wrong but still neat to see.
- flukus 8y agoOn the big one in particular it looks like you can see the outline of several other large rocks that come together to form it.
- whatshisface 8y agoIf the big one and the small one both came together from relatively large rocks, why would they be smooth but not completely joined together? Whatever smoothed the small one or the large one should smooth them both together, unless the large and small ones both started out as smooth because of their formation from much smaller pebbles.
- jstanley 8y agoI believe that's the prevailing theory for what it is.
- hypothete 8y agoYou've got it right, Ultima Thule is what's called a contact binary: https://en.wikipedia.org/wiki/Contact_binary_(small_Solar_System_body) https://en.wikipedia.org/wiki/Contact_binary_(small_Solar_Sy...