A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

What if a planet slammed into Earth? Could we survive it - or would we even notice it coming? In this lightning-fast Q&A, ...

A recent study introduces the idea of Planet Y, a theoretical world that could explain strange gravitational behavior beyond Neptune. Published in Monthly Notices of the Royal Astronomical Society: ...

Some habitable worlds orbiting dead stars could be kept alive for aeons thanks to a quirk of Einstein’s theory of gravity ...

Astronomers are researching an Earth-like exoplanet that could contain water, according to NASA. The exoplanet, named TRAPPIST-1 e, is being monitored by the James Webb Space Telescope, the most ...

For the last month and change, you might've seen the headlines about the planetary alignment, or a planetary parade, going on in our solar system. And that's true. In January 2025, Venus, Mars, ...

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 ...

York University planetary scientist Dr. Charles-Édouard Boukaré discusses molten rocky exoplanets: rocky planets so close to ...

Did you see the bright star next to the moon? That was Venus, and part of a conjunction between the moon, Venus and the star Regulus. Will it return?