why we cannot live in other planets?
952694
Depends.  We can live on other planets and other places of the universe if we adapt.  (i.e. we could build a moon base and live inside the moon base with air and sustaince)\n\nThis would be considered the "artificial" way of living on another planet.\n\nBut assuming you question was as to naturally living on a planet; what deters us from being able to live on most other planets "naturally" is because they don't satisfy living conditions needed for humans such as:\n\nhabitable atmosphere\nsustaining gravity level\nlivable temperatures and weather \neasy geology, soil compensation\nsources of sustenance such as water/vegetation\nmagnetic field, dynamo\n\nOkay each explained.  As we live on earth with certain conditions any extreme can cause complications.\n\nWe need habitable atmosphere to breathe.  Also it needs to be existing at some level to block out radiation from intense solar rays (if a star exists there).\n\nGravity level needs to be subjected to our existing body shape and form.  If gravity was too intense our body would pull down that would form an evolution of us to become more flattened and shorter.  We may adapt but it would definitely make it hurt while there.  Atrophy is a key term here!  Same goes for other way.  We would end up being bouncing up and down if we were on a low gravity area.\n\nHaving temperatures in sync to our bodies ability to adapt is important.  If we are able to sustain handling colder weather by warming up with jackets and heat sources maybe.  But let's say it's a place of 500 degrees below zero.  Then we end up putting a lot of source of energy to keep us comfortable.  Weather is important too.  If we lived on Jupiter (if we could live on gas surface) we would be continously bombarded by electrical and hurricane type weather.  Or the chemical structure of atmosphere as first condition listed if it was a methane storm we would be undoubtedly dead.\n\nEasy geology.  Remember the movie "Armageddon"?  The rocky terrain jutting up with sharp points of the asteroid would make it hard to traverse the area.  Also from previous point the surface of the planet needs to be solid...Jupiter as a gas giant makes it hard to live on that.  Soil composition is important in regards to sustaining life in soil for vegetation.\n\nWhich from that point any form of vegetation is important to our survival.  We could build biodomes and such but if had to live using sources from the planet to help we would have to counteract any harmful levels (i.e. too much sulfur) to make it workable.  Also water is the most important essential needed (outside of oxygen).  Any way to form that materials on the planet or it should be existing already.\n\nFinally magnetic field is important to help ionizing levels of radiation occuring from any solar activity.  Having the dynamo which means planet with a central core of molten iron in a circumvent can help make the field.\n\nThere are numerous other conditions but these seem the obvious big ones.
474682
They, like us, are probably unaware of the existence of beings on other planets. The universe is infinitely large, so if there is life elsewhere(there probably is), then the distance is likely too great to travel in a lifetime.
317186
Well it makes sense that there would be visitors from other worlds.  The idea that Earth is the only planet in the whole universe that supports inteligent life is very arrogant, really.\n\nIt is a bit like the notion that the earth is round.  For hundreds of years, people were only aware of there immediate environments and could not embrace the idea that the earth is round.\n\nAlso, it was long assummed that the sun and planets rotated around the earth.  A famous scientists proposed that actually the planets, inluding earth, rotated around the sun.  He was punished for this, and it was many years before "Scientists" finally accepted it.\n\nToday, persons who come forward with evidence of extra terrestrial life are usually labelled insane (or locked away or killed by the powers that be).\n\nHow long will it be before "Scientists" accept this reality??
827505
No other planets are habitable for humans.\n\nMercury and Venus being far too hot.\n\nJupiter, Saturn and Neptune for being gas giants and so has no solid surface. The gravitational pull of these planets would crush our bodies. Juipters gravititational pull is over 300 times the earth.\n\nPluto is too far away thus seeing temperatures of over -200 degrees C.\n\nMars would have been a perfect candidate, as the temperature is quite similar to earth's at occasion. But our lifes need plenty of water and the abundance of water on Mars is basically zero.\n\nFor other life than humans, a moon called Europa, which orbits Saturn, contains frozen methane and water, which could harbour life. The only problem is its a moon and not a planet.\n\nThere are all the other planets (approximately 250 so far discovered) in the Keiper Belt which need to be examined
26117
Since there is no planet UMO in our solar system, I assume you are referring to a planet outside of our solar system.  \n\nScientists have discovered extrasolar planets,[1] but all of the planets we discovered are so far away, that even if we had sent a electronic signal to them the day we discovered one, since such signals move at the speed of light, our signal to them would not yet have arrived.[2]  Therefore, regardless of the name of the planets we have discovered, the limits imposed by the finite speed of light preclude the possibility of any ongoing communication with the planets (or more precisely, with any possible intelligent life that might inhabit them).\n\nIn short, no, there isn't.
410657
Surely it's impossible to travel BEYOND the stars. Given that our universe is infinite, as we know it, and that the nearest star to us is too far for us to travel to now, I cannot forsee anyone EVER travelling TO a star, let alone BEYOND the stars.\n\nThat said, I do believe that there is other intelligent life out there. We would be arrogant to believe otherwise!
839167
No they live on different planets
249308
Sure why not.\n\nJust look up in the night sky. There are so many starts we can see, and untold planets we can't. This is just one galaxy. There are so many more out there in the univers. It is really silly to think that with all those planets, ours is the only one that has life.\nOur planet is still a young one. I'm sure there are life forms on other planets that have technology we can't begin to comprehend
1003114
Our solar system is not the only solar system in the universe.  There are hundreds and thousands and millions of other planets in the universe, and many are just like ours, but we don't know about them because we have never been able to get anything further than pluto to get a good specific picture of stuff.  In a general picture, though, we do know there are other galaxies in the universe
610320
Come to think of it... we all know that our planet is an insignificant speck circling an ordinary star, far out on a spiral arm of the Milky Way Galaxy, which is an ordinary congress of a few HUNDRED BILLION stars among at least a HUNDRED BILLION GALAXIES!!!\nWe are still the only intilligent life we know of anywhere. But now humankind has taken a dramatic leap towards a possible demotion. Planet-hunting scientists and astronomers world wide are refining their technique in detecting other planets in far off stars & galaxies. who knows that one day, we may be able to find a world that is much like ours?\nFor now, humanity can bask in its special status as the only life known to be contemplating such questions. Many scientists predicts that this distinction, too, will crumble. But the search for other worlds is not only a quest for kindred intelligenc. it is also about the destiny of human species. Where are we going to be a hundred million years from now? Where will we go, and how will we get there? And how will it change who we are? _end
441225
We are one of many planets surrounding a star at the edge of a Galaxy which contains billions of other stars.  There are many other galaxies in the universe with about the same amount of stars and planets.  I think that we would be naive to think life does not exist anywhere else.  I don't know if we will ever be able to travel the distances required to find out.  Technology will have to develop a considerable amount for that.  But, considering what we have accomplished in the last 100 years, we may do it.  Maybe not in my lifetime, but in yours or your children's.
503768
If there is life on other planets it will find us before we find them.We are in the stone age when it comes to transportation on the planet. Only 2% of the gas you put in your car is used to propel you.When it comes to space travel we are even more barbaric.
241844
There are many reasons we want to know about other worlds.  One large reason is the possibility of extraterrestrial life.  Is there life outside of Earth?  Is it intelligent?  What benefits can we derive from contact with alien life forms?  What dangers could it pose to our way of living?  Increasing our knowledge about other worlds is probably the best method currently available for answering these important questions.\n\nFurthermore, there are pragmatic issues at stake.  The Earth cannot sustain life forever.  Eventually, human beings must populate other planets if the species is to survive.  (Examples of possible global cataclysms rendering the Earth unihabitable abound--at least a dozen blockbuster movies in the last decade have been based on some type of apocalyptic circumstance.  And though the premises remain remote, on an infinite timeline all possible events approach certainty, i.e. the habitability of the earth will eventually end).  If we are to survive, we must prepare to inhabit other worlds, and in order to do so we must learn about them.\n\nAside from the survival of humanity, another practical reason for seeking information about other planets exists:  the increasing competition for natural resources.  The nature of the system tends toward a more and more efficient consumption of resources.  Since the quantity of terrestrial resources is finite it stands to reason that very soon we will need to seek external resources to sustain systemic growth.  (This is why one of the major functions of the current probe missions is to determine the chemical composition of extraterrestrial bodies--we're looking for stuff we can use).\n\nIn the end, though, the best answer to this question is probably much more simple:  people are curious.
10008
we are the only planet sustaining life for myriad reasons.  first there is the distance from the earth to the sun.  if you were to increase the distance by only a few hundred miles. the earth would be to cold to suport life.  same thing the other way if you decreased the DX (distance) the earth would be way too HOT.  not to mention the increase in solar radiation UV and otherwise. so at least in this solarsystem a habitable planet would have to be about the same distance away from the sun.  and they have sent deep space probes out to verify that there isnt another planet in syncronusrotation to earth on the other side of the sun.  \n\nthere are other reasons some to complicated to mention and the rest, well... sorry but i just couldnt be bothered right now to list. things like the speed of the rotation of the planets, atmospheric conditions, lack of atmosphere,  gravity effects. etc etc etc....\n\nbut the most important reason that there are no other planets capable of suporting life is because Thats the way GOD made things.  \n\nnow potential exists for man to make habitable environments on 1 or 2 of the other planets in the solar system (mars possably venus) but that wouldn't be the planet sustaining life there. it would be technology sustaining life there.
237520
i think there is life on other planets but they probably won't look like the ones in movies and if if there are why would they want to invade  this tiny spek of dust in the vast universe?
948247
NO\nimagine, if we went to some other planet and find intelligent life (intelligent as people), what would we do? \nfirst we would destroy them if we can, but if we cant then we would run away. \ndo we tolerate other people? wars and everything? we can't stand each other, we can't stand some other animal, we kill everything. specially if we are smarter. do we ask rats haw they feel, we just kill them because we don't like them and we don't understand them, and we don't want to understand. we don't share with others!\nI believe there is life in space, but I don't believe that they knew about us, or if they do I don't think that they want to live in peace.\nI think that they are exactly like us!\nhey, but that is just me!
83493
No, that's why wars happen and massive epidemic viruses. Nature has its way of underpopulating, but if science continues keeping people that should die at their old stages from dying maybe someday we could get overpopulated. Therefore we should move to another planet...hehe