There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

That budgetary change aligns with the priorities of Elon Musk, who founded his SpaceX rocket company two decades ago with ...

Venus dominates as the brilliant “Morning Star” in the east-southeast before dawn; the Eta Aquariid meteor shower takes place ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

This spectrograph map, generated from data collected by NASA's New Horizons probe, depicts the relatively uniform brightness ...

Once the quirky underdog of our solar system, Pluto held planetary status until 2006, when it got a cosmic demotion that still stings space fans. Discovered in 1930, Pluto was the ninth planet for ...