Scientists found a mysterious rogue planet roaming aimlessly outside our solar system. What if it came closer?

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

Pandora, a University of Arizona satellite, is locked and loaded for launch into space, which is just hours away.

After years of planning, UofA's latest satellite is ready to blast off and study planets outside of our solar system.

NASA’s Hubble Space Telescope has captured infant planets colliding around Fomalhaut, one of the brightest stars in the night ...

Explore the vast distances between planets and objects in our solar system, and why most of the space around us is a wide ...

A third suspect in the torture and murder of a young Tempe woman, Mercedes Vega, is behind bars in Phoenix. Jared Gray was ...

The James Webb space telescope has found a weird planet that is shaped like a lemon. This planet is 2,000 light-years away from us. The James Webb Spa.

The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact configuration and later underwent a violent reshuffling that scattered them to ...

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

Astronomers tracking a nearby star system thought they had spotted an exoplanet reflecting light from its star. Then it ...