In 2025, astronomers sharpened their view of the planetary system around Proxima Centauri — the sun's closest stellar ...

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

Hundreds of distant planets may be far larger than scientists once believed. New research reveals that many exoplanets found by NASA’s Transiting Exoplanet Survey Satellite (TESS) might have been ...

Astronomers have identified a giant planet circling a tiny red dwarf star at a distance so extreme that it sits about 690 ...

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 ...

A distant world with carbon in its atmosphere and extraordinarily high temperatures is unlike any other planet we’ve seen, ...