Today In The Space World on MSN

Pluto's demotion: The real reason it's not a planet anymore

For decades, Pluto was our solar system's ninth planet. This video explains the scientific journey that led to its ...
Today In The Space World on MSN

Found: A frozen world twice as far as Pluto

Astronomers have discovered 2017 OF21, a mysterious dwarf planet in the solar system's frozen outskirts. This video explores ...

The Geminids are one of the best meteor showers of the year—and the weirdest. Here’s how to see them

This December's dazzling display comes from a strange asteroid with comet-like behavior—and a tail of debris that astronomers ...