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A surprisingly youthful estimate of the age of the rings has stirred a backlash.
After an interstellar asteroid shot past the sun, scientists realized that there’s probably a lot of itinerant rocks out there.
Astronomers have discovered a complex planetary system still swirling into existence.
Astronomers are puzzling over a paucity of planets in the galaxy measuring between 1.5 and two times Earth’s size.
A new experiment confirms the existence of “superionic ice,” a bizarre form of water that might comprise the bulk of giant icy planets throughout the universe.