Mars does not have Earth’s kind of magnetic shield, so it has often been treated as the solar system’s more exposed world. It ...

A "domino effect" may occur in star systems whereby newly formed planets close to a star help shepherd dust and gas to create more planets farther out in the system. Astronomers using a mountain ...

In an unprecedented discovery, astronomers have detected a rare exoplanet located at the very edge of the Milky Way galaxy, using a method grounded in Albert Einstein’s theory of general relativity.

You may be familiar with the notorious Mercury retrograde, but Mercury is not the only planet to go through this stress-inducing phase. In 2025, eight planets will retrograde at various times ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...