Approximately how many planets have astronomers found that orbit their own sun? The answer after I receive your estimates.
2007-12-14 11:47:12 · 20 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
And the winner is: Stork
2007-12-14 12:44:46 · update #1
Both you and Stork are wrong : (
To date (..12/14/07..) EXACTLY 268 extrasolar planets have been found.
http://vo.obspm.fr/exoplanetes/encyclo/catalog.php
2007-12-14 13:13:11 · answer #1 · answered by Chug-a-Lug 7 · 0⤊ 0⤋
1
2007-12-14 11:50:14 · answer #2 · answered by allthebest1s 2 · 0⤊ 1⤋
Our sun - 8 planets, 3 dwarfs, and 13 candidate dwarfs.
Other stars - as of December 2007 there are 268 known exoplanets orbiting other stars.
So far, 20 of these stars have more than one planet known to orbit it.
2007-12-14 12:22:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Actually is the statement that we can't estimate it, is not really true, using drake's equation, scientists estimate that there are 10 planets per star system, there are an estimated 300 billion stars in the Milky Way, giving us an estimate of 3 trillion planets in our galaxy, scientists believe that the Milky Way is a large galaxy, so the average number of planets is probably smaller.
2016-05-24 00:07:56 · answer #4 · answered by karol 3 · 0⤊ 0⤋
I assume you talking about extra-solar systems? withing our own galaxy
Or, are you asking about how many in the universe?
If one were to assume the number of solar systems in a Galaxy of say a hundred, then a million galaxies would harbor ten million. We just have not found them yet.
If an extra terrestial observer at a distance of only four thousand light years away would look down a our earth, he would be watching the Egyptians building pyramids!!
2007-12-14 12:01:00 · answer #5 · answered by fathomdiver 4 · 0⤊ 0⤋
9. But then scientists took away Pluto coz it wasn't a planet (I think it was a massive rock), so that would be 8 but then astronmers found another planet call planet X/or some number I dont remember so there are 9.
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Ur Anus
Neptune
..Planet X or A number>>
2007-12-14 11:51:40 · answer #6 · answered by |*awesome*| 3 · 0⤊ 1⤋
Since the first extra-solar planet was discovered in 1998, about 270 in all have been found.
2007-12-14 11:53:12 · answer #7 · answered by stork5100 4 · 1⤊ 0⤋
There is only one 'sun', ours.
Our star has 8 planets.
In total I believe we have discovered more than 100 extrasolar planets.
2007-12-14 11:53:47 · answer #8 · answered by Dark-River 6 · 0⤊ 0⤋
Uh 8, pluto went bye bye because of scientific critisisim
2007-12-14 11:50:30 · answer #9 · answered by Barbara F 3 · 0⤊ 0⤋
8...since the only astronomers we know of liver on this planet
2007-12-14 11:50:21 · answer #10 · answered by Anonymous · 0⤊ 0⤋