A gaseous alien world is evaporating at a record rate, shedding considerable light on an exoplanet mystery, a new study reports.
Neptune, the other blue planet, is the eighth planet in our solar system. Neptune is an ice giant.
Evidence of a big, unseen world in the extreme outer solar system continues to mount, giving astronomers more and more confidence that "Planet Nine" is real.
Why settle for a planet or two when you can catch all of them in just one night of intense skywatching?
"Twinkle, twinkle, little star" is a twisted sort of lullaby for astronomers, because the effect that enchants the casual stargazer blurs images taken by even the most powerful telescopes.
Jupiter's Great Red Spot — the most powerful storm in the solar system — is an planetary icon. See photos of the giant storm, which has been shrinking over time, in our full gallery here.
Ariana Grande apparently likes giant planets. Jupiter and Neptune caught Grande's eye, with the "No Tears Left To Cry" singer spending part of Saturday (May 5) marveling at their beauty on Twitter.
For the first time, researchers re-created the high-pressure water ice likely found in the interiors of Uranus and Neptune.
The clouds in Uranus' upper atmosphere are composed largely of hydrogen sulfide, the molecule that makes rotten eggs so stinky, a new study suggests.
The solar system's outer planets — Jupiter, Saturn, Uranus and Neptune — are mainly giant balls of gas much larger than Earth.
NASA's Planetary Science Division Director, Jim Green, talks to NASA Goddard's Amy Simon, who studies the outer planets Uranus and Neptune.
Scientists used a giant, rotating pot to simulate the atmosphere of Saturn, and they may have figured out how the gas giant's massive polar storms take shape.
A dark storm on Neptune, once big enough to reach from Boston to Portugal, is dwindling to nothing as the Hubble Space Telescope keeps watch.
Triton has some peculiarities about its environment, including the fact that it orbits backward to Neptune's rotation and seems to have undergone a huge melt in the past.
Neptune's largest moon may have gotten rid of some of the planet's original satellites, throwing some into the ice giant, swallowing up some itself and hurling the rest out into space.
In this edition of Mobile Astronomy, we'll show you how to use your favorite mobile astronomy app to find Uranus and Neptune, and even see some of their moons!