New Horizons' Pluto Flyby: Latest News, Images and Video

The final photos that NASA's New Horizons spacecraft snapped of Ultima Thule during the probe's epic Jan. 1 flyby reveal the distant object to be much flatter than scientists had thought.

Astronomers just found an asteroid that zips around the sun every 165 Earth days — the shortest year for any known asteroid.

If you don't like your local weather, perhaps you would prefer the atmosphere on Uranus or Neptune — and the Hubble Space Telescope has an update on each planet's current conditions.

'Oumuamua is long gone, but it's still leaving scientists guessing. A new explanation proposes that the strange object was a "monstrous fluffy dust aggregate" produced by a busted-up comet.

Here's how to see three naked-eye planets visible in February's night sky.

When the moon's in the sky, and Venus goes "goodbye," that's an occultation.

Pioneers 10 and 11, Voyagers 1 and 2, and New Horizons are the only spacecraft currently capable of leaving the solar system. Which one will be the next to go?

NASA's Parker Solar Probe has completed its first loop around the sun and entered the second of 24 planned orbits.

The far outer solar system is teeming with mountain-size space rocks left over from the long-ago planet-formation period, a new study suggests.

See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in December 2018.

See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in November 2018.

See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in October 2018.

See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in September 2018.

See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in August 2018.

The weirdly clustered orbits of some far-flung bodies in our solar system can be explained without invoking a big, undiscovered "Planet Nine," a new study suggests.

Set your timers for 10 hours, 33 minutes and 38 seconds — scientists have finally figured out how long a day lasts on Saturn, cracking a lingering mystery about the ringed gas giant.