The Moon That’s 2 Moons Stuck Together

In November 2023, NASA's Lucy spacecraft flew by the asteroid Dinkinesh and made a startling discovery: not only does this small asteroid have an even smaller companion (named Selam), that companion is shaped like a two-tier snowman. It's the first example of a contact binary satellite in the solar system!

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Sources: https://docs.google.com/document/d/1dE8Ok7rokyFnHTeccUo_jBs6OZIRrtFvqar-TeeLTEM/pub