Solar System

Pluto's Status As A Non-Planet

Excited for the August 21 eclipse? Visit our Eclipse 2017 page to explore the science, history, and myths of the event. The Curiosity team will be viewing the eclipse alongside NASA in Carbondale, Illinois. Follow us on Facebook for live videos, trivia, and interviews on the big day.

Remember Pluto? Of course you do—we all do. In 2006, Pluto had its status as a planet revoked. Nothing about Pluto changed, but the definition of a planet did. However, Pluto may once again become a planet in the future. So we're not totally breaking up with Pluto—we just need to take a break for a while. Why is Pluto not currently considered a planet? The videos below will answer that burning question.

Watch And Learn: Our Favorite Videos About Pluto

Is Pluto A Planet?

Short answer: No. But, of course, it's a little complicated.

Share the knowledge!

Key Facts In This Video

  1. Pluto is smaller than 9 moons in the Milky Way galaxy. 01:32

  2. Pluto was discovered in 1930. 02:55

  3. Pluto was re-categorized as an object in the Kuiper Belt, alongside other icy orbs. 03:33

What Is A Planet?

To understand why Pluto isn't a planet, we first must learn what a planet really is.

Share the knowledge!

How Many Planets Are In The Solar System? this a trick question?

If you liked this you'll love our podcast! Check it out on iTunes, Stitcher, Google Play Music, SoundCloud, search 'curiosity' on your favorite podcast app or add the RSS Feed URL.