The discovery of the Kuiper Belt revealed thousands of icy objects near Pluto, challenging its status as a planet. After the discovery of Eris, astronomers formally redefined “planet” in 2006, leading ...

In 2020, astronomers detected WD 1856+534 b, a gas giant that orbits a star 81 light-years from Earth. This exoplanet, which is roughly six times the mass of Jupiter (making it a "super-Jupiter"), was ...

In 2006, Pluto was famously demoted from a planet to a dwarf planet. It remains the most famous dwarf planet today, but there are others in our solar system, including potentially hundreds that ...

In a groundbreaking discovery, astronomers have identified a potential dwarf planet candidate, 2017 OF201, buried within ...

Astronomers at The University of New Mexico have published new research confirming three bodies orbiting the dynamic exoplanet system TOI-201. They include a super-Earth (TOI-201 d), a warm Jupiter ...

Astronomers announced they discovered the TOI-201 planetary system, which greatly expands our understanding of how solar systems form and develop. It is located 370 light-years from Earth, has three ...

LOS ANGELES - After a nearly eight-year journey, a NASA spacecraft on Friday flawlessly slipped into orbit around Ceres in the first visit to a dwarf planet. The robotic Dawn craft will circle the ...

Pluto lost its planethood for a very specific reason. Whether or not that’s a good reason depends on who you ask.

The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...