In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

Are there hidden planets in our solar system? New technologies, like the powerful Rubin Observatory, brings us closer to ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

In 2016, scientists Michael Brown and Konstantin Batygin suggested that an unseen Planet Nine could explain the unusual ...

This hypothetical Neptune-sized planet would circle our Sun on a highly elongated path, far beyond Pluto. It could have ... Neptune before they leave the solar system entirely.

This huge astrological shift is a total game-changer. Here’s how Pluto in Aquarius will affect you—for the next two decades.

Scientists recently detected carbon dioxide and hydrogen peroxide on the frozen surface of Charon, Pluto's largest moon. The researchers conducted the survey using the James Webb ...

A Southwest Research Institute-led team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids ...

A ninth planet may exist beyond Neptune in the Kuiper Belt, a region populated by icy bodies that orbit the Sun.

Solar system formation models using measurements of organics from comet 67P/Churyumov-Gerasimenko and the most widely adopted solar composition ratios did not produce the dense, rocky Pluto-Charon ...