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To qualify as a solar system, there would need to be at least one planet orbiting a star. Current estimates in our own Milky Way galaxy average about one planet per star, which would mean about 300 billion solar systems. Recent data hint that about 40 billion of those may have an Earth-like planet orbiting in the habitable zone.
There are also a smaller number of rogue planets not in solar systems, and the first exoplanet discovered in another galaxy has been identified.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoWe know that The Hubble Deep Field image contains 10,000 galaxies. At 2.5 arcminutes, that's roughly 1/2,000,000 of the visible universe in any direction. So if we multiply 3,000,000,000 x 10,000 x 2,000,000 we get 6 sextillion or 6,000,000,000,000,000,000,000 planets in the visible universe. It is likely much more than that.
Wiki User
∙ 15y ago8.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune and Uranus (Pluto is too small to be a planet.)
Wiki User
∙ 11y ago42.068
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How many exo-planets are there?
we've only found more than 300-256 . but we cannot determine the number of all the exo-planets in the universe.
How many planets are there in the whole universe?
700 quintillion planets There are over 700 quintillion planets in the universe — but there's no place like home.
How many dwarf planets are in the universe?
3
How many extrasolar planets are there in this this universe?
There are about 480 which have been discovered so far in the universe a handful of them are dwarf planets. Hope this helps!!!!
Is there life anywhere else in the whole universe?
Currently it is not known. With current technology, we are not able to detect the presence of life on other planets even if it does exist. However, we now know that planets are relatively commonplace, which many scientists believe strongly suggests that life must exist elsewhere in the universe.
What is the Earth smaller than?
The sun,jupiter,uranis,saturn,neptune and many other planets and stars in the universe. The sun,jupiter,uranis,saturn,neptune and many other planets and stars in the universe.
How many exo-planets are there?
we've only found more than 300-256 . but we cannot determine the number of all the exo-planets in the universe.
How many planets are there in the whole universe?
700 quintillion planets There are over 700 quintillion planets in the universe — but there's no place like home.
How may planets is there?
We can never know how many planets there are in the entire universe.
How many dwarf planets are in the universe?
3
Have you found life in the universe?
Seen as earth is a planet in the universe, life does exist within it. Statistics say that because the universe goes on infinitely, many billions of planets will have water on them and the correct atmospheric conditions for life to exist. However, we'll never find this information out in our lifetime, as other planets are many millions of light years away, by which time, global warming may have destroyed our planet etc.
Is there leaving things in other planets?
Yes there are living things on other planets. think of how many planets there are in this universe. It would be something like 1/100000000000000000000 chance of Earth being the only planet with life.
How many extrasolar planets are there in this this universe?
There are about 480 which have been discovered so far in the universe a handful of them are dwarf planets. Hope this helps!!!!
Why is there life on earth but not on anty outher planets?
There is life on other planets. Imagine, there are 1000 planets in the Universe for every grain of sand on the earth. That's how many planets there are, so scientifically, the chance that there must be life on other planets as well is much greater than the chance that there is no life.
How old is the other earth?
There are many planets in the universe, but as far as we know there is only one Earth, therefore I do not know to which "other earth" you are referring.
How many hours does murcery have in a day?
Mercury, has 24 hours in a day, the same as the earth and all the other planets in the Universe.
How many basic planets are there?
Currently there are 353 known extrasolar planets (that is to say, outside of our solar system), but it is unknown how many planets exist in the universe.
