The majority of stars in our galaxy are home to planets. The most abundant are the sub-Neptunes, planets between the size of Earth and Neptune. Calculating their density poses a problem for scientists ...

For decades, Uranus and Neptune have been filed neatly into the “ice giant” drawer, shorthand for worlds built mostly from ...

If you look at our Solar System, there’s a sharp divide between the four rocky planets and the large “ice giants” of the outer Solar System, Uranus, and Neptune. The divide isn’t only a matter of ...

How do we know anything about the winds on these remote planets? The main sources of information date back to the close encounters of the Voyager 2 spacecraft with Uranus (in 1986) and Neptune (in ...