Other contributors have said "How many known planets are in the universe?" is the same question as "How many planets are there in the universe?"

# How many planets are there in the universe?

Would you like to merge this question into it?

#### already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

#### exists and is an alternate of .

There is an astronomical number of planets in the universe. We are only now beginning to be able to "see" planets around other stars because of the vast distances that exist between us and them. How many there actually are is anyone's guess.

What we know about galaxies is that the ones we observe contain 200-400 billion stars each. Our solar system contains 8 planets. If we assume each star has 1 planet, and not more, and we average a galaxy to 300 billion stars we can deduce:

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.
Billions certainly, probably billions OF billions. In the last two years since the launch of the Kepler Space Telescope, our "known planet count" has gone from eight to "thousands", and more are discovered every month. It begins to appear that planets are as common as, well, "dirt".

We only _know_ of one universe, THIS one - although there seem to be theoretical reasons why there might be other universes, it seems unlikely that we will ever be able to directly detect them.
18 people found this useful

# Why are there planets and stars in the universe?

Well, scientist have a theory that there was a big bang and space,a giant rocky ball of gas and this ball exploded and all it'scontents went into deep space. Rock and gas formed the planets andgas formed the stars.

# What is the largest planet in the universe?

The largest exoplanet so far discovered is. . Sept 2004. HAT-P-1, is located some 450 light years from Earth in the constellation Lacerta. It is nearly 1.4 times larger than Jupiter. . Aug 2007. TrES-4, a gas giant about 1,400 light years away in the constellation Hercules. It is 70% larger than (MORE)

# How many planets are there in universe?

may be there are 8 planets because Pluto is not a planet now.scientists are still discoverig a new planet As of today (Jun10) 463 planets have been discovered... the math to calculate a number for the whole universe in complex, many variables, but even in unprovable scenarios, the estimate numbe (MORE)

# What are the planets in the universe?

No body truly knows all the planets in the universe but ask a science teacher or a student that studies planetary science.

# How many planets are in the universe?

With admiration and kudos to "Labouts" for his superb previous answer to the same question, we reproduce it below. If you haven't the patience to read it, the loss is all yours. In summary, the answer to your question is "Lots". ======== Astronomers estimate there are 10 21 stars in the u (MORE)

# How many planet are there in the universe?

Currently there are 8 planets in the universe which are Mercury,Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The planetPluto is no longer considered a planet as it was years ago.

# What is the hottest planet in the universe?

We obviously don't know what the hottest exoplanet is but the highest estimated recording we have is of the planet HD 149026 b which is 2038 C or 3700 F

# How big is the planet relative to the universe?

There is a easy way of figuring out. Look below Earth is a tiny dot compared to the solar system. The solar system is a tiny dot in the milky way. The milky way is a tiny dot to the galactic clusters. The galactic cluster is a tiny dot to a super cluster. The super cluster is a tiny d (MORE)

# What is the biggest planet in the whole universe?

This is a very hard question to answer, as the over 99.999 of our universe is undiscovered. Right now, we think that HAT-P-1, a planet orbiting a distant star is the largest. It's roughly 1.4 times the size of our Solar System's largest planet Jupiter.

# Why planet Pluto is not included in our universe?

Pluto is most certainly considered in our Universe (all matter is, the Universe contains everything). But it did get "demoted" within our solar system (that is defined as all the matter that is attached to this particular star, our Sun) from a planet to a planetoid and this is because its definition (MORE)

# Do planets exist in other universes?

At the present time, we don't know if other universes even exist, let alone the nature of their physical laws. However, if other universes DO exist in the way we (presently) expect them to exist, then it would be quite surprising if ALL of them had physical laws that do not permit the existence of (MORE)

# How many known planets are there in the universe?

Eight (8) in our solar system, something like 700 others outside our solar system, with evidence of even more being documented all the time.

# Which are the planets of the universe?

There over at least a billion planets out there orbiting at least a million stars. We do not no any important planets out there right now, at least currently.

# How many planets does the universe have?

No-one can possibly know for sure, but the answer is probably billions. There are hundreds of billions of stars in our own Milky Way galaxy, many of which have solar systems of their own, and as many galaxies in the Universe as there are stars in our own galaxy (and the Milky Way is by no means a pa (MORE)

# What are the planets in your universe?

Planets in orbit around other stars, other than the sun, have just begun to be discovered, in the past few years. So far, a few hundred have been discovered. We're only able right now to investigate the stars that are relatively near us, in our own galaxy. Looking for planets in other galaxies (MORE)

# Can the scientists project how many years more the planet earth exists in the universe?

Theoratically, the earth will continue to exist and support life (assuming that current events such as global warming do not affect this), so long as the sun continues to shine. This is simply because the sun, being at an optimum distance from earth (the two closest planets to earth, mars and venu (MORE)

# How many planet in universe?

We have no way of knowing how many, although we do now know that there are other star systems with planets, or notable "accretion discs" (from which planets will form). It is a very difficult area to explore because planets, even very big planets, are a fraction of the size of the stars they surroun (MORE)

# How many planets are there in the solar system and in the universe?

8 in the Solar System. Unknown billions in the universe.. There are 8 planets in our solar system and 5 objects identified as dwarf planets. There are at least 81 planets confirmed to be around nearby stars, and another 256 possible plants that are not yet confimred. There is no way of knowi (MORE)

# How many dwarf planets are there in the universe?

As we don't know the size of our own Universe we cannot possible even begin to put a figure to it, it would be incalculable.

# How many planets are there in this universe?

To be exact there would be millions upon billions because you said the universe But you're probably searching for our solar system There are 8 planets known to be in our solar system 1mercury. 2Venus. 3 earth. 4mars 5Jupiter 6Saturn 7uranus 8neptune Pluto is left out because (MORE)

# How many other planets in the universe have you found?

We know that The Hubble Deep Field image contains 10,000 galaxies.At 2.5 arcminutes, that's roughly 1/2,000,000 of the visibleuniverse in any direction. So if we multiply 3,000,000,000 x 10,000x 2,000,000 we get 6 sextillion or 6,000,000,000,000,000,000,000planets in the visible universe. It is like (MORE)

# How many extrasolar planets are there in the universe?

We have no idea how many there may be in total, but as of mid-2010, evidence of over 400 had been detected. Today, in the enlightened present of 2013, rough estimates, of thenumber of planets in this universe, vary between1,700,000,000,000,000,000,000 and 72,000,000,000,000,987,654,321. Only 1001 o (MORE)

# How many known planets are in the universe'?

As of early 2013, a bit over a thousand planets are known. However, it is estimated that most, perhaps all, stars have at least one planet.

# What is bigger university or planet?

A planet is bigger than a university. You probably meant a universe and a universe is bigger than a planet.

# How many planets are on the universe?

Potentially there are a lot. If all solar systems had eight planets, like ours, then there would be 8 x number of stars in the average galaxy (~200 billion), then multiply this by the number of galaxies (another 200 billion or so). In the region of 300,000 billion or 300 trillion would be a rough gu (MORE)

# Are there other habitable planets in the universe?

there are probably many billions of habitable planets but for now theres just earth but 40 years ago the star gliese 581 was discovered,4 planets among it many were 2 hot but 2 were separated from the rest by scientist,both with water but 1 of those planets were too far out and was vereh cold (MORE)

# Diameter of the largest planet in the universe?

Nobody knows what is the largest planet in the universe, but Jupiter is the largest planet in the Solar System.

# Where is the largest planet in the universe?

We won't know the answer to that question until 1). We know that we've discovered every planet in the universe, and 2). We know the size of every planet that we've discovered.

# 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!!!!

# What is largest planet in the universe?

The largest planet in the universe is actually an extra-solar planet by the name of TrES-4 which is in the constellation of Hurcules.

# Are there trillions of planets in the universe?

Trillions would be a minuscule percentage of all the planets in our solar system, let alone the universe No. There are more then 8 plants for sure because scientist's discovered them but I am sure that in other universes they are there(if only are space probes can go to other universes. Oo (MORE)

# Which planet has maximum gravity in the universe?

Jupiter has the greatest gravitational field in the Solar System. The Universe is a lot bigger and we are only just starting to discover some of the planets outside our Solar System.

# Which is the coldest planet of the universe?

In our solar system Uranus, furthest planet from our sun, is the coldest. There are likely interstellar planets ejected from binary star systems that would be much colder yet--we simply have not found them. We only know of planets around are star and nearby stars--we don't know of all of them in (MORE)

# Are there only eight planets in the universe?

There are eight planets and several 'dwarfs' in our own solarsystem. Outside of our solar system, evidence of over 700 planets has beenfound (as of mid 2013), and the conjecture is building that there may beplanets orbiting MOST stars.

# Who or what created planets and the universe and how were they created?

The universe was created by a quantum fluctuation, a rupture or tear resulting in the rapid expansion of space and the beginning of time. Scientists call that initial period "The Big Bang," though it was not a literal explosion in that matter itself did not come into existence until after the separa (MORE)

# Which planet in the universe is the biggest?

there is no answer for that coz only a limited portion of the universe has been explored

# How did planet earth appear in the universe?

I'm a christian so i belive that the wonderful God created the whole universe. If you want more information read the Bible. x Another take is that earth formed from many small asteroids that were bound together by gravity. More and more asteroids collided with Earth as it grew larger and had (MORE)

# Is the planet Pluto a part of universe?

yes Pluto is still in the universe its still in the solar system ":0" but it just isn't considered to be a planet any more

# What are the 8 planets in the universe?

Actually, they are the 8 major planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Please note that there are many more minor planets in our solar system, and possibly billions of other planets in the universe. ^-^

# Is the sun the only planet in the universe?

No! its not a planet it is a huge ball of gas called a ' Star ' which the planets orbit around.

# Are there fifteen planet in the universe?

-- There are either eight or nine known planets in our solar system, depending on what category you like to include Pluto in. -- Several hundred planets, or evidence of them, have been found in orbit around other stars, and more are constantly being documented. It's definitely looking like (MORE)

# Is there still unknown planets in the universe?

nope, NASA has them all mapped out, Pluto lost planet status. Edit : We probably know all the planets in the Solar System, but N0T in the whole Universe.

# Are there 20 planets in the universe?

As of now (late 2013), over 700 planets have been found to exist inorbit around other stars, and more are constantly being discovered.

# Are there more planets or galaxies in the universe?

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

# Is earth the oldest planet in the universe?

No, that is not likely. The Solar System - including Earth - is less than half the age of the Universe; it seems that stars formed fairly soon after the beginning of the Universe (say, within the first billion years or so), and it is likely that many of those have planets.

# Were there planets beginning of the universe?

No. It fact it took quite a while before planets could be formed -at least solid planets. In the beginning (say the first billion years), there were onlygasses - almost all hydrogen and helium. They were used to make Generation II stars (yes, the naming isbackwards). Those stars, or at least the big (MORE)

# There are planets in the universe?

Yes. There are 8 planets in our own solar system and more than2,000 that have been discovered so far orbiting other stars. It isestimated that out galaxy alone contains 100 billion to 400 billionplanets.

# How many Earth-like planets are there in a fictionalized version of our Universe?

There are at least 10 billion trillion Earth-like planets (with 100billion per galaxy) in a fictionalized version of our universe.

# How many Earth-like planets with sentient life are there in a fictionalized version of our Universe?

There are 10 million trillion Earth-like planets with sentient life(100 million per galaxy) in a fictionalized version of ouruniverse.

# How many earth-like planets are in the universe?

There are more than 10 billion trillion Earth-like planets (100billion+ per galaxy/1 or 2 per star) in the universe, and estimatesmay vary.