NASA’s Voyager 2 spacecraft flew past Uranus in 1986 and Neptune in 1989. These flybys remain the only close-up observations of either world. Voyager 2 measured each planet’s magnetic field, radiation ...

"In our study, we investigated how the chemical interactions between magma oceans and atmospheres affect the water content of young sub-Neptune exoplanets," says Werlen. To do this, the researchers ...

When NASA launched the Kepler spacecraft in 2009, it opened a new era of exoplanet discovery, revealing thousands of planets orbiting other stars. Among these were mini-Neptunes, or sub-Neptunes, ...

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 ...