Snapchat Planets ranks you in a friend’s top 8 using planets from Mercury to Neptune, showing your closeness based on chats, ...

Ready for a show? A six-planet alignment begins Aug. 10. Here are which planets you can see and how to get the best view.

The caldera may have blasted out its cryomagma in a single explosive event, or it may have spread its eruptions over time.

Pluto was once known as the ninth planet but was reclassified after scientists set clear criteria for planets. The key factor ...

Bring up the former planet Pluto in conversation and you’re guaranteed to be met with a strong opinion. In one camp are those ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37.7 billion kilometers) away, light reflecting off Ammonite takes ...

Pluto has never been much of a planet — small, wired orbit, not much atmosphere — and questions about its status have been raised periodically since its discovery 76 years ago. This week, the ...

Pluto once held its place proudly as the ninth planet in our solar system,a distant, icy world on the edge of the cosmic frontier. But in 2006, everything changed. This in-depth explainer unpacks ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its status as the ninth planet in our Solar System.

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in our solar system.

Cable network Animal Planet sent out a joke press release announcing a deal for the famous escaped Bronx Zoo cobra — news that some outlets reported earnestly.