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 ...

A new study, however, identifies a possible candidate. A separate team of astronomers compared 1983 data from the Infrared ...

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, ...

Launched in 1977, the Voyager spacecrafts were never expected to remain operational for over four decades. Yet in 2024, they continue to function far beyond Pluto’s orbit, challenging our historical ...

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.