Comets are often treated as leftovers, but sometimes the leftovers become the primary focus. That is the case with 3I/ATLAS, only the third known interstellar object seen crossing the solar system, ...

How many Earths could fit inside the planets of our solar system.

Scientists explore the Interplanetary Habitable Zone framework to evaluate habitability beyond the Goldilocks Zone, considering energy, radiation, transport, and material factors in planetary systems.

Researchers analyzed 28 Ryugu asteroid samples and found preserved magnetic signals that record early solar system magnetic fields and water-driven alteration on its parent body.

Astronomers produced the most complete map of the center of the Milky Way, which can provide insight into how stars and ...

Venus and Saturn are due up for a visually striking event known as a planetary conjunction. Here's everything to know about ...

Venus and Saturn will appear close together in the night sky Sunday, March 8. Here's how to see the conjunction from around Arizona.

Understanding the make-up of asteroids also matters for the future of exploration: some asteroids may contain metals, ...

Impey, Distinguished Professor of Astronomy at the University of Arizona’s Steward Observatory, will receive the Lewis Thomas ...

Starship’s heavy lift capacity, in orbit refueling, and potential aerobraking role could significantly accelerate a long-awaited mission to Uranus.

What happens when a solar superstorm hits Mars? Thanks to the European Space Agency's Mars orbiters, we now know: glitching ...