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

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

Gaia-4b is considered a super-Jupiter planet, a relatively cold gas giant, orbiting its star over 570 Earth-days. That star ...

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

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

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 ...

Explore the impact of stellar flares on the potential for alien life. Discover how higher levels of UV radiation can both ...

Using the Keck Planet Imager and Characterizer (KPIC), astronomers have performed high-resolution spectroscopic observations ...

The organic ingredients to life, hints to where Earth’s water came from, and the fundamental building blocks of our planet ...