New analysis of ALMA observations of interstellar comet 3I/ATLAS show its water carries a chemical signature pointing to a colder, more distant origin than any comet ever measured.

Astronomers have got their clearest look yet at the surface of an exoplanet - a planet beyond our solar system - thanks to ...

A gradual dimming and brightening when a star passed behind it suggested the mini-Pluto was wrapped in a thin layer of air.

Already, data collected from hundreds of hours of observation across 57 artificial solar eclipses indicates that the solar ...

The atmosphere is between 5 million and 10 million times thinner than Earth's atmosphere. A very small body, far from the sun ...

In the far reaches of our solar system - beyond the outermost planet Neptune - resides a host of icy and desolate ​celestial bodies. Among these objects, only t ...

A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere. That would make it the solar ...

The solar system isn’t as flat as it seems. This video reveals the hidden 3D structure surrounding our planetary plane, from ...

Is Pluto a planet? At a U.S. Senate committee hearing this week, NASA's chief shared his thoughts on the decades-long debate.

Keep looking up throughout the month for some amazing sights in the night sky! The nights may be getting shorter as summer ...

The solar system is kind of hard to observe in motion all at once. Sometimes, it’s nice to have a little model to look at, so ...

NASA recently shared a photo that details the vastly different landscapes its Curiosity and Perseverance rovers have spent ...