Sub-Neptune exoplanets could have atmospheres so dense and crushing that rock is vaporized to form clouds that trap heat at ...

At the left, an enhanced-color image of Neptune from the NASA/ESA Hubble Space Telescope. At the right, that image is combined with data from the NASA/ESA/CSA James Webb Space Telescope. The cyan ...

Sub-Neptunes are the most common type of planet in our galaxy. Bigger than Earth but smaller than Neptune, these worlds ...

Astronomers have characterized the atmosphere of a young (20 Myr old) transiting exoplanet and found it to be unusually clear and puffy. By analyzing the planet's atmospheric features, they were able ...

A giant planet was supposed to have the place to itself. Instead, in a star system 190 light-years away, a hot Jupiter shares space with a much smaller world, a mini-Neptune tucked even closer to the ...

The planet transfer its magnetic energy into the outer atmosphere of its star.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Aurora on Neptune, as seen by the james Webb Space Telescope ...

There aren't a lot of Hot Neptunes in the galaxy, and it's not entirely clear why. A Hot Neptune is, as the name implies, a Neptune-sized planet orbiting within 1 AU of its host star. While we've ...

Planets can be extremely hot when they are born, and new computational experiments show that such planets would have an atmosphere composed of a homogenous mixture of hydrogen and water. As the ...