Because Uranus and Neptune are so far away, scientists only have educated guesses about the combination of ices and gases ...

The atmospheric composition, composed mostly of heavier species, for example, water and methane, strongly suggests that it is hydrous genesis. This finding is a turning point in sub-Neptune’s science, ...

Aug. 31, 2023 — A Neptune-sized planet denser than steel has been discovered by an international team of astronomers, who believe its composition could be the result of a giant planetary ...

How does the environment that planet lives in change what we expect to see? Are their atmospheres more like Neptune or like Earth? Is there a smooth transition from one type of planet to the other is ...

NASA has found something on Uranus and Neptune. The ice giants of the solar system have long been enigmas for science.

On Neptune far out in the solar system it’s a different story—but what happens on the ice giant planet nevertheless appears to be inextricably linked to the same solar cycle. Having looked at ...