A team of astronomers has announced the discovery of a giant gas planet that has already lost more than one-third of its mass since its ...

At the beginning of the exoplanet age, the goals were fairly simple. The first was to find as many of them as possible to ...

Saturn reigns supreme when it comes to the number of moons orbiting any solar system planet. Including the 128 ...

Discovered by volunteer scientists, this alien planet is out of synch with its siblings ...

Pluto sits far out in the Solar System, small and dim, moving at a pace that barely fits human timelines. It was found in ...

A new report explains a young star system where low-density planets show how super-Earths and sub-Neptunes begin to form, based on new findings from the V1298 system ...

Pluto's days, though they drag on a bit at around 153 hours, are nothing compared to its years. Pluto's orbit takes 248 Earth ...

Now, a new Nature study points to an answer by catching four planets at a stage most systems never show us: The awkward, ...

The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...

New research tracks young planets around a nearby star, showing how large, gas-rich worlds shrink over time to become the most common planets in the galaxy ...

Key takeawaysPlanets larger than Earth but smaller than Neptune are the most common kind in the galaxy, but because our solar ...

Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...