The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

"These relics are effectively fossils of the planet formation process, holding vital clues to deciphering the history of our solar system." ...

Plus: Observe two stunning spirals, see Venus reappear as a morning star, and enjoy the Last Quarter Moon in the sky this ...

Donaldjohanson, a main belt asteroid, could be a relic of a cosmic collision that took place 150 million years ago.