Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

Scientists have found thousands of planets outside our solar system, called exoplanets, throughout the galaxy. This artist’s ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

If you have kids in school, or even if you don’t, you’ve probably realized that there’s a lot about the day-to-day of school ...

Discover Our Solar System Through Detailed 3D Models Forget dusty textbooks and flat diagrams. We’re talking about ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

According to Doyon, LHS 1140 b doesn't resemble Earth so much as it resembles our solar system's icy moons ... to forget about that planet," Schwieterman said. "It's going to be both a scientific and ...

The textbook picture of how planets form—serene, flat disks of cosmic dust—has just received a significant cosmic twist. New research, published in Astrophysical Journal Letters, is set to reshape ...

Somewhere at the edge of the solar system a new Earth-sized world might be lurking, dubbed Planet Y. Astronomers have long proposed that there might be hidden planets beyond the Kuiper belt, a region ...