The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

The organic material found in a few areas on the surface of dwarf planet Ceres is probably of exogenic origin. Impacting ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

The dwarf planet is a bizarre, cryovolcanic world. However, the organic deposits discovered on its surface so far are unlikely to originate from its interior. The organic material found in a few areas ...

Stargazers can witness a rare 'planet parade' in January and February 2024, where six planets align prominently in the night ...

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

After graduating from UVA in 2013 and completing her doctorate in planetary science from the University of Arizona in 2019, ...