Pluto Not a Planet, Astronomers Rule
Mason Inman
for National Geographic News
August 24, 2006 (Updated 3:30 p.m. ET)
Pluto has been voted off the island.
The distant, ice-covered world is no longer a true planet, according to a new definition of the term voted on by scientists today.
"Whoa! Pluto's dead," said astronomer Mike Brown, of the California Institute of Technology in Pasadena, as he watched a Webcast of the vote. "There are finally, officially, eight planets in the solar system."
In a move that's already generating controversy and will force textbooks to be rewritten, Pluto will now be dubbed a dwarf planet.
But it's no longer part of an exclusive club, since there are more than 40 of these dwarfs, including the large asteroid Ceres and 2003 UB313, nicknamed Xena—a distant object slightly larger than Pluto discovered by Brown last year.
"We know of 44" dwarf planets so far, Brown said. "We will find hundreds. It's a very huge category."
A clear majority of researchers voted for the new definition at a meeting of the International Astronomical Union (IAU) in Prague, in the Czech Republic. The IAU decides the official names of all celestial bodies.
The tough decision comes after a multiyear search for a scientific definition of the word "planet." The term never had an official meaning before.
2006-10-05 03:54:11
·
answer #1
·
answered by Anonymous
·
0⤊
0⤋
Mercury,Venus Earth Mars Jupiter Saturn Uranus Neptune
2006-10-03 20:20:38
·
answer #2
·
answered by Anonymous
·
0⤊
0⤋
Officially and to the scientific community there are 8 planets. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Pluto still exists of course but is no longer considered a planet, this comet is now considered a Dwarf Planet along with several other large asteroids and comets.
2006-10-03 16:35:34
·
answer #3
·
answered by iMi 4
·
0⤊
0⤋
Mercury, Mars, Earth, Venus, Jupiter, Neptune, Uranus and Saturn plus Pluto. Not necessarily in that order from the Sun.
2006-10-03 15:06:59
·
answer #4
·
answered by FrogDog 4
·
0⤊
0⤋
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Those are the "big" planets. Don't know about the small planets though (they exist). Pluto is out of the definition of big planet because it's too small.
2006-10-03 15:05:37
·
answer #5
·
answered by latgal73 3
·
0⤊
0⤋
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
2006-10-03 15:04:13
·
answer #6
·
answered by Ryan G 2
·
0⤊
0⤋
Um Pluto was cancled as a planet because it's not big enough or something. Um everything else that was a planet b4 is still a planet except for Pluto.
2006-10-03 15:04:59
·
answer #7
·
answered by Anonymous
·
0⤊
1⤋
8 official planets, now
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
2006-10-03 15:07:42
·
answer #8
·
answered by Anonymous
·
0⤊
0⤋
Uranus, Saturn, Mercury, Jupiter, Earth, Venus Mars, Neptune
Pluto is now called a dwarf
2006-10-03 15:05:22
·
answer #9
·
answered by Mightymo 6
·
0⤊
0⤋
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune!!
2006-10-03 15:05:00
·
answer #10
·
answered by Party Lyk a Rockstar 2
·
0⤊
0⤋