A gradual dimming and brightening when a star passed behind it suggested the mini-Pluto was wrapped in a thin layer of air.
A nearby “super-Earth” is giving scientists a rare look at the bare surface of a distant world, and it’s far from Earth-like.
MIT astronomers using the James Webb Space Telescope have discovered that a rare "planetary odd couple", a hot Jupiter and a ...
Pluto was believed to be the only body beyond Neptune with an atmosphere. Now, a new discovery in our solar system is ...
Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for ...
Astronomers have detected the chemical fingerprint of a frozen, water-rich planetary fragment being devoured by a white dwarf star, offering the clearest evidence yet that icy, life-delivering objects ...
The frigid temperatures and weak surface gravity of the small bodies has long caused astronomers to believe they aren’t ...
A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere. That would make it the solar ...
If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.
In the far reaches of our solar system - beyond the outermost planet Neptune - resides a host of icy and desolate celestial ...
Is Pluto a planet? At a U.S. Senate committee hearing this week, NASA's chief shared his thoughts on the decades-long debate.
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