From gravel-size meteoroids to mountain-size asteroids and even visitors from other star systems, space is packed with ...

Pluto is no longer considered a planet because it doesn't meet all the criteria set by the International Astronomical Union.

The Ultraviolet Spectrograph (UVS) aboard NASA's Europa Clipper spacecraft has successfully completed its initial commissioning following the October 14, 2024, launch. Scheduled to arrive in the ...

The International Astronomical Union, which reclassified Pluto as a dwarf planet in 2006, is the arbiter of such ...

Stars that pass close to the solar system could pull planets out of alignment, sending them hurtling into the sun or out into ...

The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) aboard NASA's Europa Clipper spacecraft has successfully ...

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our solar system.

This annual event organized by the Kittitas Environmental Education Network includes many outdoor educational activities, ...

From solar probes to deep space missions, these record-breaking human-made objects reached speeds that make bullets and jets ...

A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.

Billions of years ago, in the frozen edges of the solar system, a violent impact shaped one of space’s oddest pairs. Instead ...

In 2005, thanks to Michael Brown’s scientific antics, Pluto was removed from the list of planets in the solar system. In 1968, the Apollo 8 mission flew around the moon. In 2001, Chris Hadfield became ...