How many planets are they in space???(including moons)?

Answer 1

In our solar system, there are 8 planetary bodies, 4 dwarf planetary bodies, and thousands of other objects much smaller.

Of our 8 planets: Mercury & Venus have no moons.
Earth has 1 natural satellite
Mars has 2
Jupiter has 31 (16 large, 15 smaller - but this number changes day to day)
Saturn has 59 (but this number changes day to day)
Uranus has 27 (5 large, 22 smaller)
Neptune has 8 (1 we can see, 7 we discovered with space probes)
Pluto has 3, with the last 2 we only discovered in the last few years.

In addition, there are 209 extra-solar planets we're aware of, which most likely also have moons, but we cannot detect them at this distance, at least not yet.

Answer 2

Hello there. My name is Zah. And, because you asked such a question, I assume that you are new to Astronomy.
So, let me help you a little bit.

Where we are right now is on the Planet Earth which is part of our Solar System orbiting around our star, the Sun. Eight planets with their associated moons all circle around the Sun. Some planets have zero moons, some have one, and others have several. The exact numbers are not material since you have posted your question in reference to all of space, not just our Solar System.

Now, our Solar System all orbits around our star, the Sun. And our Solar System is a part of the Milky Way Galaxy which contains more than 200 Billion other stars similar to our Sun (some bigger, some smaller; some singles like our Sun, some doubles, triples, and even clusters). Each one of those stars could have from 0 to 10 (or more) planets with their associated moons orbiting around them. The Milky Way Galaxy is a disk shaped configuration about 1.5 Light Years Thick and 1500 Light Years Wide. In the center of this disk is a large ball of stars so dense and brilliant that we are unable to see the individual stars. Extending out from this central ball are a number of spiral arms made up of stars. Our Star and Solar System are located about 1/3 of the way out on one of those spiral arms. So, within the Milky Way Galaxy alone there is opportunity to have just hundreds of billions of planets and their associated moons.

Now, if you move away from "our Galaxy" there are thousands and thousands of other galaxies with each one of them having billions of stars within it. And, as you might guess, each one of those stars could have from 0 to 10 (or more) planets with their associated moons circling about them.

So the exact number of planets and moons within the total Universe is an unknown number, but very, very large. We cannot see all of those planets and moons because from a great distance we are looking into the intensity of the individual stars (which blinds us). There are certain new techniques for the location of distant planets in other solar systems and those techniques seem to work for "very large" planets fairly well. 239 of those distant planets outside of our solar system have been detected and cataloged so far, with many, many billions more to identify, verify and log.

If you are interested in learning more on this subject may I invite you to do a search on the Internet using the key words:
Curious About Astronomy

If you do that you will be lead to a site developed by Cornell University for people interested in Astronomy. It is an excellent site and has lots of pictures and sketches to assist your Outer Space educational process.

Good Luck,
Zah

Answer 3

Space is big really, really, really, really big. So if our solar system is the average then 9 x Amount of stars in the universe = planets in the universe. (Also if again our solar system is the average there are approximately 2.4 moons per planet(an assumption(a guess))).

Then

9 x Amount of stars in the universe x 2.4 = Amount of planets and moons in the universe.

You may also wish to factor in assumption that our solar system is or is not that average type of solar system.

if identical

=1/1

if half are identical

=1/2


if 10% are identical

=1/10

So we have


(9 x Amount of stars in the universe x 2.4)
x assumption on % our solar system is the average = Amont of planets and moons in the universe

Answer 4

A clever chap called Frank Drake came up with an equation famously called the "Drake equation" which will give an educated guestimate, have a look on the internet you,ll find it interesting, the ultimate outcome of the equation gives the number of planets that could sustain intelligent life. I wonder if they have a version of Yahoo Answers?????

Answer 5

Well Mr Technicality, if you where technical you would know that the answer to your question is that no one knows, and more than likely more than you can imagine. I suggest that you should carry out a search of the web for "Space" and learn about it but, as you may have trouble spelling, ie, "they" should be spelled "THERE", I have added the link below.

Answer 6

Seeing how you haven't limited us to our solar systems the correct answer is that the number approaches infinity.

even within our solar system this answer can not be determined with certainty because of the different classifications system and discovery of new moons and extra solar planets.

Answer 7

thats a moot point, and moons arnt planets, pluto is also not classed as one now
if you include moons, its hard to tell how many we dont even know about, persephone is the most recent discovered

Answer 8

moons arent planets. but there are 8 planets. starting from the closest to the sun- mercury venus earth mars jupiter saturn uranus neptune (bye bye pluto... u didnt make the cut)----- well thats in the milky way

Answer 9

Billions? Trillions? Who knows?

Answer 10

In my space there is only one Earth, but in others there are loads!