2006-10-27 01:01:36 · 14 answers · asked by Chucky 2 in Science & Mathematics ➔ Astronomy & Space
Many. We do not and will not ever know the exact number.
2006-10-27 01:08:59 · answer #1 · answered by IT Pro 6 · 0⤊ 0⤋
Within a couple orders of magnitude as many as suns. We don't seem to have found any in Alpha Centauri, and those found farther away appear to be of gas-giant size. Our own sun has 8 regular planets and at least two moons that would qualify as planets if they had their own Solar orbits (Luna and Titan).
The number of moons appears to be within the same general range - recent findings of moonlets around Saturn might add a couple of magnitudes, though. Again, this will be a definition game what to accept as moon, and what as lesser satellites.
Van Oort cloud planetoid bodies and asteroid belt planetoids (including Pluto and Sedna) appear to be more numerous, and comet-sized bodies yet more numerous.
In general, we lack observational data to make better estimates.
2006-10-27 08:12:03 · answer #2 · answered by jorganos 6 · 0⤊ 0⤋
There are 9 planets in the universe. First of all if you want to know Pluto is not a star as it has two moons. Planets whether small or large that don't have moons around them are called stars as their magnetic field and gravity is too small to attract anything in space .
1.Mercury
2.Venus
3.Earth
4.Mars
5.Jupiter
6.Saturn
7.Uranus
8.Neptune
9.Pluto
2006-10-27 08:50:41 · answer #3 · answered by SUE N 2 · 0⤊ 2⤋
there are probably lots of planets that we can't see but as for our solar system there is now 8 pluto is no longer a planet because of it's size (dwarf planet)
2006-10-27 08:10:32 · answer #4 · answered by ♥Senior@Carrick♥ 3 · 0⤊ 0⤋
How many dust particles can you count in your room each morning? What about your house? What about your town? What about your planet?
As each dust particle could be a potential planet!
Get it?
2006-10-27 08:21:32 · answer #5 · answered by Manny L 3 · 0⤊ 0⤋
in the universce.... let me see.
Last count there are two hundred.
Atleast that is the ammount of planets that we know about for sure. (astronomers have been able to see only 200 includeing the ones in our solarsystem.)
But if you assume that eath star hase atleast one plannet, then you are going to have basicly an infinite ammount.
2006-10-27 08:07:44 · answer #6 · answered by farrell_stu 4 · 0⤊ 0⤋
Definitely an unknown number. I don't think anyone could even give a hypothetical answer to that. each day they find hundreds more galaxies and it would be impossible to even guess. Watch this video and maybe it will help!
2006-10-27 08:08:57 · answer #7 · answered by RIDLEY 6 · 0⤊ 0⤋
there are 100 billions of stars in our galaxy alone.then there are probably twice or three times as many planets.
so there are billion and billions of planets in our universe.
2006-10-27 09:21:56 · answer #8 · answered by reshu 1 · 0⤊ 0⤋
Only 8, Pluto was recently declared not to be a planet =)
Oh, universe lol. Don't know, but that's for our galaxy.
2006-10-27 08:03:53 · answer #9 · answered by Anonymous · 0⤊ 3⤋
Loads
2006-10-27 08:08:56 · answer #10 · answered by Anonymous · 0⤊ 0⤋
Hey do not rely on the human calculation pls go through the olden Indian books for information or .god only knows it
2006-10-27 08:12:12 · answer #11 · answered by sakthi s 1 · 0⤊ 0⤋