Astronomers had observed auroras on all other planets in the Solar System, and spotting one in Neptune completes the list.

The two exoplanets, or planets outside of our solar system, orbit a star called TOI-1453, which is slightly cooler and ...

The asteroid space scientists feared would hit Earth may now smash into the Moon instead. Space rock 2024 YR4 was originally ...

In short, yes. As the fastest-moving planet in our solar system, Mercury goes retrograde three to four times a year. When you factor in the shadow period of the retrograde—and as a recovering ...

Young, close-orbiting exoplanets known as sub-Neptunes may form farther from their stars and migrate inward or lose their ...

Astronomers have captured direct images of exoplanets in a star system 130 light years away, providing clues on gas giant ...

A new classification scheme may help us better understand planet formation — including the history of our own family of worlds.

The most elusive planetary aurora in the Solar System has finally been revealed in all its gently glowing glory.

A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system ...

Earth has a nearly circular orbit, but some planets outside our solar system, called exoplanets ... The researchers used data collected by NASA's Kepler telescope, which monitored 150,000 stars ...

Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.