Astronomers have been left puzzled by the discovery of an unusually large planet orbiting a remarkably small star, a cosmic ...

Scientists have uncovered surprising new behavior of Jupiter that directly affects Earth in ways we are only beginning to ...

WASHINGTON (Reuters) -Astronomers have spotted a cosmic mismatch that has left them perplexed - a really big planet orbiting a really small star. The star is only about a fifth the mass of the sun.

New research suggests there may be a narrow window of possibility for life to persist on the icy moons of the outer solar ...

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system ...

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 ...

Giant planets are not rare per se — after all, we have four in our own solar system. Such large worlds are, however, rarely ...

Ancient Greek astronomers likely observed Uranus as a star, but limited tools and geocentric views kept them from recognizing ...

Science teaches us that stars are much larger than planets, but what about large planets that orbit small stars? This is what ...

The atmosphere itself is… not so fine. It's mostly carbon dioxide, which hey, it's what plants crave, but also a lot of ...

What's happening in the skies over North Texas this month? June holds some spectacular sights in the night and morning sky.

Learn how ice crystallizes on the surface of Europa, a moon of Jupiter, may hold promise for signs of extraterrestrial life ...