Poor Pluto. Today astronomers voted to strip it of its planet status, downsizing Pluto to a dwarf and leaving our solar system with just eight planets.
The new rules say a planet must be “a celestial body that is in orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a … nearly round shape, and has cleared the neighborhood around its orbit.” Pluto doesn’t make the cut since its orbit overlaps with Neptune’s.
Read a news story.
Watch a video: Pluto—Does Size Matter?
More about Pluto:
- Pluto Facts and Images
- Photo: Clear View of Pluto
- Pluto (For Kids)More about the solar system:
- Solar System Exploration
- Solar System Simulator
- What’s in the Sky Tonight?
- Solar System JigsawThe astronomers have voted. Now what do you think about Pluto’s demotion?
Image of Pluto and its moon Charon courtesy NASA
One thought on “And Then There Were Eight”
I think it is absurd to say that pluto I’snt a planet just because it’s orbit overlaps with Neptune. Shouldnt that mean that Neptune isnt a planet either? Pretty soon there wont even be a solar system , they may try to say that earth is the only planet . How ridiculious !!!! Pluto has been a planet for as long as I have been alive , so in my mind it will reamin a planet