Triton was discovered in 1846 by the British astronomer William Lassell, but much about Neptune’s largest moon still remains a mystery. A flyby by NASA's Voyager 2 spacecraft in 1989 offered a quick ...

Uranus and Neptune may soon lose their reputation as the "boring" planets of the solar system. Long overshadowed by the grandeur of Jupiter and Saturn, scientists now believe that beneath their thick, ...

Scientists have long assumed that, like rocky planets such as Earth, sub-Neptunes begin with molten magma oceans. Their thick hydrogen-rich atmospheres were thought to trap heat efficiently, allowing ...

We might finally understand what’s going on inside Uranus and Neptune, and the answer is pretty surprising: They may each contain an ocean of water. “We didn’t really know anything before,” about ...