On Feb. 18, 1930, Clyde Tombaugh discovered Pluto, at that time classified as the ninth planet.

A new study examines how much material from the closest star system to Earth will end up in orbit around the Sun, and how ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

The zodiacal light shines in the evening as the Moon reaches Last Quarter and skims past Spica and Antares in the sky this ...

These popular astronomy questions, answered by Astronomy magazine, will help you better understand our universe - and share ...

Prepare to get schooled If you have kids in school, or even if you don’t, you’ve probably realized that there’s a lot about ...

Scientists have been unable to determine whether the dwarf planet’s organics were produced by its own chemical processes or ...

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

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

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to the bottom of whether Pluto is a planet, I tracked down planetary scientist ...

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

Samples from asteroid Bennu have delivered insights into the origins of Earth’s water and the organic molecules that may have ...