Are we alone in this universe?

Question

do the scientists prove the existance 0f life in other planets like earth?
how many planets have been dicovered and recongnized to be like
earth,? all living conditions?
any idea about to see other creatures from other planets?

Answer 1

So far we've seen no verifiable evidence of other sentient species. That said, I believe with some certainty that somewhere in our galaxy at some past, present, or future time, a sentient species did/does/will exist.

Why haven't we heard from them?

Perhaps they are not technologically advanced enough to be heard. They may be mastering stone knives right now, or experiencing their own Rennaisance.

Perhaps they are here right now. Any species sufficiently advanced to travel interstellar distances would be able to hide or masquerade with ease. That Boeing 737 that just flew by may be a surveillance craft.

Perhaps they are so far away they will never notice us and vice versa.

Perhaps they existed a million years ago and died out.

Perhaps they will exist a million years from now.

It is really impossible to know for sure.

The Drake Equation suggests that there is sentient life out there. The Fermi Paradox casts doubt. Play around with the calculation form at the second link and see what you think.

Answer 2

We used to think that the earth and sun were just ordinary and commonplace in the universe. Today we know that they are unique in many ways. In fact, there are more than 20 (some scientists list 30 or 40) parameters that have to be right for a planet to support life. The probability of even one planet meeting these conditions, in the entire universe, has been calculated to be pretty much zero. Yet here we are.

For example, the nearly circular orbit of Jupiter helps the earth maintain a nearly circular orbit as well, protecting us from huge temperature swings (which would happen when the earth got really near to or far from the sun in a highly elliptical orbit). The larger planets also protect us from asteriods and other objects, as evidenced from the Shoemaker-Levy hit.

The moon is also, surprisingly, essential for our survival. See the links for more information. In short, the belief that many other planets may have life is not supported by science, but it's possible if God exists and designed other solar systems as carefully as ours seems to be.

Answer 3

no conclusive proof yet , but the discovery of another earth like planet isn't necessary to prove life exists some where else. that would be saying that any other intelligent life must be water-based like we are. scientists know of micro-organisms that exist devoid of water so it's possible that life can exist in places we wouldn't think of. the fact is is that we don't know what type of life forms could exist and under what circumstances. my personal belief is that micro-organisms exist probably on most planets but intellignet life akin or greater to us is another story. the most important thing to note is that the compounds that exist on this earth exist thru out the universe so it's not only likely that we are not alone it's better than likely that we are not alone. with the all the attention paid to this topic now days, if the govt or nasa does know for sure we will probably hear about it within the next ten years or so. the secret can only get harder to hold.

Answer 4

First of all I would like to know why Brookiev is trying to use a science question to convert the more logical thinking of us into religion, we are talking factually, not about stories made by gullible human`s, look at the fact`s regarding religion there are none.
It is a mathematical certainty that other life exist`s, this does not mean that it does exist, only as an equation. Space is so vast that we can`t comprehend the enormity of it, other beings finding us is extremely remote, at least being able to travel at the speed of light is essential and even then too slow for the distances that need to be covered, so for them to find and visit us they will need to be far more advanced than we are, it is more likely that any form of life will be very primitive and we would have to find it, not them find us, we know almost certainly that our area of space holds no other life, for us to travel outside of our galaxy even at the speed of light would take hundreds if not thousands of years and we are nowhere near traveling at the speed of light. I don't think we will ever see beings from another world.
Chris.

Answer 5

No, I don't think we are alone. So far mars seems to be close enough to be our twin. some scientist say there could of been rivers in such on mars a long time before we came along. That would lead us to believe that there could have been living things on it. As much as we would like to think that we are the only intellectual beings in the universe, I find it hard to believe. There is more than us silly humans out there. even if it is just micro organisms in a puddle of water on planet X.

Answer 6

We will probably never be able to disprove the existance of life elsewhere in the universe, since the distances are so great and there are so many stars, and therefore planets, that we could not observe enough planets in enough detail. So unless we do find life, we will never know.

Answer 7

Mohsen,
we are not alone---but scientists are not the answer to the proof or disproof of this subject matter--- they are into the building blocks of the here and now as it relates to the then and there--- and too heads down into the proof they need of their own little pet "projects" for the "grants" and "funding" that it will bring----- to be at something that they've already gone on record discounting !!
There are by estimates --- tens of thousands of "earth-like" envoirnments out is space --- the numbers are absolutely staggering !! And, to believe that the law of averages doesn't favor there being MANY other forms of life out there is just simply assinine and idiotic !!!

Answer 8

Probably not but if there is life they're along long ways away. So far, there have been no earth like planets discovered but the technology won't be up and running for a couple of years.

Answer 9

We humans are very limited in our reaches in outer space, I for one totally believe in the Bibles account of the creation of life by a supreme all knowing God, the same one who claims he created all, now since He created all out of nothing, and we know we are nothing. wont it be just as easy for Him to create life in all the other planets? the bible says this planet is the only one who fell into rebellion against it's maker, so we became lower then the rest of creation when we fell from grace, therefore our diminish ability to see, and our limited power to reach other planets where nobody fell, or lost their personal one on one communication with the all powerful creator of the universe. so yes, there is life in other planets, is just that God is not gonna let us go some place else and start stirring up trouble there also, look at what we have done to our own planet, we don't have such a good track record with God, do we?

Answer 10

So far, nobody knows for sure.... If we ARE alone, it's an awful waste of space.

We know of a few rocky-type worlds orbiting other stars, but we're unable (so far) to detect Earth-size worlds. Maybe in the next 10 years or so, a system will be worked out that can spot those kinds of worlds around distant stars.