2006-10-27 07:35:01 · 21 answers · asked by 3D-Guy 1 in Science & Mathematics ➔ Astronomy & Space
There used to be 9 planets. Pluto was knocked-out because astronomers do not like a "dwarf planet"!
2006-10-27 07:59:24 · answer #1 · answered by nicedd 1 · 0⤊ 1⤋
Planets are large masses of what used to be hydrogen atoms. When "the big bang" occured the explosion caused the atoms of hydrogen to gain extra subatomic particles and become heavier atoms like oxygen, nitrogen, sodium ect. Check your periodic table to see them.
Anyway, each of these atoms all had a gravitational pull to them and soon the gravitational pull of the atoms created large masses of atoms which became pushed closely together creating planets, moons, suns, and other heavenly bodies. The densest atoms are at the center of the earth while the less dense atoms are found more at the surface. N, O, H, Na ect.
The largest mass in our solar system is the sun, therefore all planets revolve around the sun. But each planet and moon has a gravitational pull so the gravity of each planet also plays a part in the rotatio of our solar system.
All in all we have 9 planets that are effected directly by the gravitational pull of our sun. So we have 9 planets in our solar system.
The number of planets in the universe is huge though.
2006-10-27 07:44:12 · answer #2 · answered by evilive 4 · 0⤊ 0⤋
Recently, the astronomers said that there are 3 new planets and that Pluto was no longer a planet. Therefore, there were 9. Add 3. Subtract 1. We get 11 planets. I have always felt that Pluto was a really Mickey Mouse planet anyway.
2006-10-27 07:38:36 · answer #3 · answered by robertspraguejr 4 · 0⤊ 2⤋
billions of billions of billions
The universe is huge so the number of planets is vast.
If you mean planets in our solar system then you are really asking what is the definition of a planet. There are lumps of rock and ice of all sizes between a speck of dust and jupiter and deciding which of these should be called planets is purely an arbritrary decision.
2006-10-27 09:43:28 · answer #4 · answered by m.paley 3 · 0⤊ 0⤋
In this solar system, I think it's 8. Starting nearest to the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Pluto has just been declassified because it's too small to be a planet.
2006-10-27 07:38:11 · answer #5 · answered by Katya-Zelen 2 · 1⤊ 1⤋
Millions- but in our solar system there are 11. KEEP UP GUYS- PLUTO IS CLASSIFIED NOW AS A DWARF PLANET BUT IT'S STILL A PLANET!!!!!
BY THE WAY FOR ALL THOSE ABOVE- ERIS IS XENA; IT WAS NICKNAMED THAT BEFORE.
2006-10-27 08:41:10 · answer #6 · answered by nor2006 3 · 0⤊ 0⤋
In our solar system there are eight. Outside of the solar system there is anywhere between 160 and 200 known planets.
2006-10-27 07:40:26 · answer #7 · answered by bldudas 4 · 0⤊ 1⤋
there are 8 now because they no longer take pluto as a planet
2006-10-27 07:38:02 · answer #8 · answered by allie 1 · 0⤊ 1⤋
They say there are around 6 planets per star that we cannot see yet, and there are billions of stars in each galaxy and billions of Galaxy's in the universe, so the number of planets is HUGE, beyond comprehension !!!!!!!!!!!.
2006-10-27 07:42:57 · answer #9 · answered by Richard 6 · 2⤊ 1⤋
Many. 8 that we have discovered in our solar system, but I believe there are more to find. Now, in the universe, whoa, it's a little more than humans can discover, eh?
2006-10-27 08:01:59 · answer #10 · answered by Anonymous · 0⤊ 1⤋