Do you believe that there is an "earth-like planet" in the universe?
367327
Yes.  Actually there is a mathmatical formula for finding the number of habital planets in the universe.  I remember that it is in three parts, but cannot for the life of me remember the exact formula.  It is based on number of stars (suns), how many planets would be orbiting the suns with the same life producing elements we have on earth, and the possibility of the same type of factors in evolution we had here on earth.  \nThe problem with the formula is that it represents only the type enviromental factors to produce "life" as we know it, not taking into regards other element based sources of life.  For instance, we are water based, whereas some other life forces may be silicon (Star Trek fans) based or based on an element we don't even know about.  \nYou may want to search the internet for the formula.  Sorry I can't remember it from my astronomy classes many years ago!
18963
This is a little hard to answer.\n\nFirst, we haven't found any.  So there's no positive evidence, so it's hard to be really sure. \n\nBut on the other hand, there are billions and billions of planets like ours, and it would be really weird if ours was the only one to have life on it.\n\nSo most astronomers think there's probably life out there somewhere.  I hope we find it.
1139974
It may well be!\n\nThe problem is that we haven't really looked. It's true that the probes we've sent around our own solar system have drawn a blank when it comes to life. Life as we know it seems to prefer a certain range of temperatures and habitats, and those conditions aren't all that common. But they do exist, both here in our solar system and (almost certainly) in other solar systems as well.
714325
our earth is about 4.5 billion years old.\nwell its a mystery that whether all the planets have been created atonce,but\naccording to the big bang theory there was a large explosion resulting in te formation of planets.\nnoone can say this is true or not..
148056
The universe is not actually infinite, although it is unimaginably large - perhaps up to thirty billion light years across with a couple of million galaxies.\n\nHowever, the circumstances that created Earth are quite unique: only we emerged from the particular dust cloud that formed us, only on Earth did a 600 million year old glaciation lead to the pre-Cambrian explosion of soft-shelled complex life of the upper Ediacaran, and only on Earth did an asteroid hitting Mexico's coast clear out the large reptiles in order for the larger brained mammals to take over. \n\nIn short, a very specific sequence of events permitted us. It is almost certain that the exact parallel events have not happened anywhere else.\n\nThat is not to say that there are not Earth-like worlds out there. The Hubble telescope has a new refraction technique that has allowed it to find rocky worlds in other solar systems, and it recently found a world that is somewhat similar to the Earth (but five times larger.)\n\nBut they would not be Earth.\n\nThere is one quantum mechanical derived theory that posits a new universe breaks off with each possible choice we make.  This was the premise of a sci-fi show, "Sliders", at one point. If such universes do exist in a multi-verse, we have no way to detect them or know they are there, unfortunately.
573669
Oh absolutely.  In fact, I have long toyed with the idea that Earth is 1st grade - 2nd grade is on Mars maybe and it's about 2 civilized planets near one another, 3rd deals with multiple solar systems, etc.\n\nI think it is very hard to look up into the night sky and see all those stars and planets out there and think that we are the only ones.  It just doesn't make sense.  Why would anyone create such a vast universe just to look pretty in the night sky?
327734
I don't know about experiments and alien visits. But I know that I'd like to think that there is more out there some where. I don't even know if there is a chance that other intelegent life exists for not but I can't help but think that other planets in the universe have to be suitable for some form of life and continue to sustain something. We may never find it or know about it, especailly in this life time but there has to be more than just Earth.
362430
I think we would be very naive to believe we are the only life form in the universe.As vast and diverse as it is,I believe there has to be a reason for the formation of these planets to sustain life.That said,who knows when the life was present on these planets?And who knows what life forms are out there as we speak?Perhaps Mars and Pluto had life trillions of years ago but there are no remnants now for us to find.It's a fascinating topic.If you think about the possibilities,it's incredible.
615320
No way, there must be many, many planets throughout the universe that are similar to our own and support life. There are probably many others that support life that is much different than we are accustomed to also.
1123060
Maybe somewhere, we will probably never know! There is a high chance that in another galaxy though that there is another inhabitable planet similar to earth with life living on it, i cant believe that it has only happened to one planet in one galaxy in all of space! That would just be madness!
13099
I DONT THINK THAT WE R  ALONE . WE HAVE SEEN A FEW SIGNS OF XTRA TERRESTRIAL LIFE AND IT  IS POSSIBLE THAT THERE ARE OTHER LIVING ORGANISMS INHABITED PLANETS
813264
I hear rumors of something called Earth 2.0, subtitled "The New Heaven and the New Earth."\n\nThen again, those rumors have been going around for about two thousand years so I wouldn't invest any money in it if I were you.
413808
A simplistic 'yes' or 'no' answer to the question of whether extra-terrestrial life exists is not likely to take us to any meaningful conclusion. Nor does a communal belief in the existence of extra-terrestrials lead us, as a race, anywhere closer to understanding the true nature of the universe and its myriad possibilities vis-a-vis the development of life within it. \n\nIt is also to be noted that believing in ET life is an entirely different thing from being successful in establishing their presence. Probabilistic calculations tell us that we would be fools to think of ourselves as the sole "living" beings in this universe. But, the observable universe, atleast as it is at the present moment and given the way we are looking at it, holds no clue of extraterrestrial life of any kind.\n(There's another but to this)But yes, belief in extraterrestrial life, backed by a mathematical understanding of the possibilities would definitely go towards refining our search methodologies. Thats if we are truly interested, and if there is imminent benefit in holding that interest. These are of course, entirely different topics.
1126911
I believe there is life other than on Earth. Even if just mathematically!\nAn interesting point though, is that the authorities on this field have concluded that the nearest system that COULD support life is Sirius. That's interesting, because throughout history, the more believable tales of alien contact seem to all point to that star system. The Dogon tribe are a classic example of that. They apparently knew of Sirius A and its two companions(Sirius B and Sirius C) long before any 'civilised' society. Sirius C has yet to be discovered, but could well be there! I quote from Wikipedia: "Apparent orbital irregularities in Sirius B have been observed since 1894, suggesting a third very small companion star, but this has never been definitely confirmed." \n\nAs to us being Parasites on this Living Planet, I couldn't agree more.
1041937
NO!\n\nIN THE HEAVENS: ABOVE OUR HEADS....\nIN SPACE......\n\nOUTSIDE OF THE EARTH'S ATMOSPHERE\n\nAMONGST THE PLANETS\n\n THERE IS ABSOLUTE ORDER\n\nHERE ON EARTH.....\nJUST PICK UP THE LOCAL PAPER....WATCH THE LOCAL NEWS CHANNELS.....
49306
It depends on what you mean by earth-like. There have been a few planets that might not be gas giants and are reasonably close to their central stars so they will not be too cold discovered in extrasolar star systems. \n\nI have attached a link to a story about the most recently discovered "earth-like" planet. However, it has a "year" that is only 10 days long, and the surface is over 1000 degrees Fahrenheit, so it is not that much like earth.
65120
Who said most of us believe in aliens?  If by "aliens" you mean life existing outside of Earth, then I guess I would speculate that aliens exist.  If you have the impression that aliens are little green men that visit Earth in UFOs and use probes, then that is just ridiculous.  Considering the billions of stars in each of the trillions of galaxies that exist in our solar system, it seems logical to assume that at least one other planet in one other solar system has some form of life, even if it is only similar to bacteria.  There is no proof, much in the same way that you cannot "prove" that aliens *don't* exist.