Planetary Science

How many planets are in the whole galaxy?


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2014-01-23 03:07:00
2014-01-23 03:07:00

That is currently unknown. However, based on the planets found so far it seems there are at least as many planets as stars. Current estimates suggest 100 billion to 400 billion planets in our galaxy.


Related Questions

There are trillion trillion planets in our galaxy

There are billions of stars, planets and moons in a galaxy.

There are billions of planets and moons in the Star Wars galaxy.

Andromeda is a galaxy, not a solar system. No one knows how many planets are in the Andromeda galaxy

The Sun rotates round the galaxy, and the planets follow along with it. The whole solar system was already rotating round the galaxy when it was formed so there has been no change there.

The planets are part of the galaxy.

It is not generally known how many planets are in each galaxy; it isn't even known how many planets are in our own galaxy, and will probably never be known exactly, due to its enormous size. However, according to latest observations, it seems likely that every star has several planets, at least on average.

does any galaxy contain earth and some other planets

It is not known. Scientists are still not sure how many dwarf planets are in the solar system or how many true planets are in the galaxy. If estimates from our solar system apply elsewhere, however, the number is probably in the trillions.

Planets orbit stars, stars orbit a galaxy. Planets are not "on" anything. A lot of stars out there have planets - we are just finding out how many now that we have better techniques to find them. So probably all galaxies have at least some stars with planets.

Yes, it is estimated that every galaxy contains billions of planets.

The closest galaxy that has planets is the Andromeda galaxy. It is the nearest galactic neighbor to the earth. The Milky Way has other planets too.

It is possible that every galaxy has some planets. We just are starting to detect some planets in other galaxies.

Impossible to know. There may be 400 billion stars in the Milky Way galaxy, and we have no way of knowing how many of them have planets. We have discovered 400+ planets so far, and it is highly likely that there are millions or billions more to discover.

It is not known. The Andromeda Galaxy contains about a trillion stars, many of which certainly have planets, though we don't know how many. Many of the planets likely have moons. All told, there are likely several hundred billion to several trillion moons in the Andromeda Galaxy.

The planets we know of, some 300 now, are all in the Milky Way galaxy.

Planets are not necessarily in a galaxy but chances are very slim that in a galaxy that is not just newly forming there would not be any exoplanets.

a galaxy is a collection of stars and planets and gases. the universe is the whole entire collection of galaxies. their is nothing bigger than the universe except God

Astronomer's have not been able to count all the planets in the Andromeda Galaxy. The Andromeda Galaxy is home to one-trillion stars. The Andromeda Galaxy is expected to collide with the Milky Way in the next 4.5-billion years.

There are more planets. Every galaxy has stars, and a fair number of the stars in each galaxy have planets.

We expect the Andromeda galaxy to be just like our own Milky Way galaxy. We can see stars (suns) in the Andromeda Galaxy and just as stars have planets orbiting them in our galaxy, we believe that there must be planets also orbiting stars in the Andromeda galaxy.

No. I don't believe any planets have been detected outside of our Galaxy. Within our Galaxy, planets are detected by inference not visual techniques. See link for lists of known extrasolar planets

As a matter of fact, yes. It has planets just like the Milky way galaxy.

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