Prior to the flyby, scientists had very limited information about Ultima Thule, and their expectations were largely based on distant observations. The object's shape, surface features, and composition were largely unknown. Therefore, the detailed images returned by New Horizons provided an unprecedented look at this ancient remnant of the early solar system.
The snowman-like appearance of Ultima Thule was surprising because it suggested that the object formed from the gentle collision and merging of two separate bodies rather than a more violent collision that would have shattered them. This discovery provided valuable insights into the formation processes of small objects in the outer solar system.
Overall, while scientists had some expectations based on previous observations, the actual images of Ultima Thule exceeded those expectations and offered new insights into the nature of distant objects in our solar system.
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