Astronomers think that a dwarf planet hiding in the middle of our solar system could be a source of frozen water. The dwarf ...

It must have cleared all other celestial bodies, except its own moons, from its orbit.

A team of astronomers has uncovered an Earth-like planet orbiting a star located 4,000 light years away from the solar system ...

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

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 ...

The solar system has nine planets, but in 2006 the International Astronomical Union declared Pluto a dwarf planet, making the ...

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

On a small dwarf planet called Makemake, astronomers have seen signs of surprising temperature changes. These could indicate ...

Astronomers have discovered an Earth-like planet orbiting a white dwarf 4,000 light years away, raising questions about Earth ...

The celestial object is now redefined as a "dwarf planet," leaving just eight major planets in the solar system. After years of debate over Pluto's planetary status, the International Astronomical ...