Why is pluto no longer a planet?

Pluto was 'demoted' because it did not meet the new definition of a planet that was established in 2006. ChaCha! Ask away!

Answered by Gidget K. - 1050 days ago at 3:56pm on Mar 27 2009

On August 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two MORE?

Answered by Cherryl L. - 1050 days ago at 3:55pm on Mar 27 2009

According to the new definition, a full-fledged planet is an object that orbits the sun and is large enough to have become more?

Answered by Rachel L. - 1066 days ago at 2:16pm on Mar 11 2009

# It's smaller than any other planet - even smaller than the Earth's moon. # It's dense and rocky, like the terrestrial more?

Answered by David G. - 1078 days ago at 1:54am on Feb 27 2009

The rules for planets state that it needs to have cleared the neighborhood of its orbit, but Pluto doesn't so it's a dwarf planet.

Answered by Robert E. - 1090 days ago at 1:53am on Feb 15 2009

Pluto is now a dwarf planet, because it does not have enough gravity to pull in debris such as asteroids to make it larger.

Answered by Vanessa R. - 1107 days ago at 4:39am on Jan 29 2009