Around a star 880 light-years from Earth orbits one of the wildest, most extreme exoplanets we've found to date.

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA's ...

Last year, astronomers discovered an unusual Earth-size exoplanet they believe has a hemisphere of molten lava, with its ...

The gas giant WASP 121b, also known as Tylos, has an atmospheric structure unlike any we have ever seen, and the fastest ...

"Even the strongest hurricanes in the solar system seem calm in comparison." ...

Researchers have peered into the atmosphere of planet WASP-121b and found its climate is stranger than anyone imagined.

NASA scientists have detected a star and trailing exoplanet that may be sailing through the Milky Way with unprecedented ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar system was the only planetary system known to humans. We had no proof other ...

Jupiter’s famous clouds aren’t ammonia ice but a murky mix of chemicals, sitting lower in the atmosphere than expected. For years, astronomers believed that Jupiter’s upper clouds — responsible for it ...

Scientists have discovered a potentially record-breaking fast planetary system, with a star and possible exoplanet moving at ...

Make time soon to head outside after the sun sets and study the sky. Five of the brightest planets — Venus, Jupiter, Mars, ...

Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant ...