Astronomers have unexpectedly discovered the heaviest Neptune-like planet yet — one four times more massive than our solar system's Neptune.

Neptune, the majestic blue giant, gazed across the solar system and wondered: what would it be like to be smaller—mysterious and niche, like Pluto? So, he decided to try. But in the world of planets, ...

The exoplanet TOI-1853 b is roughly the size of Neptune but more dense than any planet of its size yet discovered ...

The Solar System does not have a clear border. The influence of the Sun in certain domains is small enough for the Voyager ...

During their exoplanet hunting, astronomers have found many rocky worlds slightly larger than Earth and just as many small-ish gas giants approaching the size of Neptune (like TOI-421 b depicted ...

Interest in steam world exoplanets really heated up in October 2024 when the James Webb Space Telescope (JWST) discovered the ...

In October 2018, astronomers discovered what they thought could be an exomoon, a moon outside our solar system. The exomoon, which is estimated to be the size of Neptune, was found in orbit around ...

Artist’s concept of a Neptune-sized planet, left, around a blue, A-type star. UC Berkeley astronomers have discovered a hard-to-find gas giant around one of these bright, but short-lived, stars ...

NASA's TESS satellite has discovered a Neptune-sized exoplanet closely orbiting its host star. It's just the fourth object of its kind ever identified.

This massive storm system, which was found in a region where no bright cloud has ever been seen before, is about 9,000 kilometers in length, or one-third the size of Neptune’s radius, spanning ...

Prior to flybys, scientists used mathematical laws and observation to determine the characteristics of the planets.

The data they uncovered indicates an exomoon the size of Neptune, in a stellar system 8,000 light years from Earth.