Neptunes, exoplanets whose sizes are between Earth and Neptune, and which are between the known for their water-rich ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

Astronomers at UC Santa Cruz have developed a new model to better understand “steam worlds,” or water-rich sub-Neptunes—some ...

Planet Nine was previously suggested as a possible explanation for distant orbital clustering. It was thought to be ten times Earth’s mass, orbiting far beyond Neptune.

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

Scientists have seen one of the mysterious “dark spots” on Neptune from Earth for the first ever time. Researchers spotted the feature using the European Southern Observatory’s Very Large ...

"It confirms K2-18 b to be our best chance to study a potential habitable environment beyond the solar system at the present time." ...

Like Earth, but super Mini-Neptune turned out to be a frozen super-Earth The density makes it look like a water world, but its dim host star keeps it cool. Elizabeth Rayne – Jul 20, 2024 3:00 AM ...