The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

Scientists using NASA's James Webb Space Telescope have observed a rare type of exoplanet, or planet outside our solar system ...

When it comes to planets in our Solar System's habitable zone, one world is too close to the Sun, another is too far and ...

This gas cloud located 500 light years away from our solar system is about to become a planet.This process usually takes a ...

Astronomers rarely see distant planets directly, instead tracking tiny stellar wobbles and fading light. How do these subtle ...

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

The direction, distance and motion of the comet through the sky during its closest approach could have made it seem like it ...

Discover which planet is the fastest in the solar system. Learn why Mercury moves at 47 km/s, has the shortest year, and ...

Discovered in archival data, the newly identified exoplanet formed after the dinosaurs went extinct. In a finding that echoes ...

Scientists have discovered the strongest evidence yet of a rocky planet with an atmosphere outside the solar system, ...

"A single collision could have catastrophic long-term consequences," the authors explain, and we would not have long to avoid ...