Mars is sold as humanity’s next home, but this video argues the real long-term prize may be Ceres — a 585-mile dwarf planet ...

As the United States prepares to celebrate its 250th anniversary, the history of the solar system tells its own story of ...

Facts about Pluto, the dwarf planet in the Kuiper Belt ...

In the course of studying planets beyond our solar system (6,316 confirmed exoplanets and counting), scientists have ...

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of ...

When astronomers discovered a giant planet orbiting a dead star in 2020, they wondered how it survived its star's violent demise. Now, observations from NASA's James Webb Space Telescope (JWST) may ...

At the right point of the orbit and stellar cycle, the star’s chromosphere brightens.

Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant Kuiper Belt objects have fueled the Planet Nine theory, but recent ...

The solar system's planet count has changed seven times in 250 years — from 6 to 11, back down, then up to 9, then 8. Planet Nine could change it again. Full history explained.

A rare celestial event will feature Venus, Jupiter, and Mercury appearing close together in the June sky. Venus and Jupiter will first appear together in a conjunction starting Tuesday, June 9.

NASA's exoplanet-hunting spacecraft TESS has a new method for detecting worlds beyond the solar system, and it is thanks to ...

Astronomers discovered a planet 25 light-years away that orbits within the habitable zone of its star that could potentially ...