“Is there life on other planets?

Answer 1

yes, life exists on other planets too... if some set of reactions/formations caused life on earth y cant the same happen on other planets...if earth has got a probability of life on earth then some other plantes can also have some probability of life...

Answer 2

Definitely no.

Arguments like 'the universe is so big there just *must* be life out there' are not based on science. Straight from Hollywood.

The earth is a very unusual planet. The sun is a very unusual star.
The probability of life evolving just once is so small as to be unimaginable.

Fred Hoyle knew a thing or two about science and maths.
He wrote:
‘The notion that not only the biopolymer but the operating program of a living cell could be arrived at by chance in a primordial organic soup here on the Earth is evidently nonsense of a high order.’Hoyle originated the famous illustration comparing the random emergence of even the simplest cell to the likelihood that ‘a tornado sweeping through a junk-yard might assemble a Boeing 747 from the materials therein.’Hoyle also compared the chance of obtaining even a single functioning protein by chance combination of amino acids to a solar system full of blind men solving the Rubik’s Cube simultaneously.
http://www.creationontheweb.com/content/view/1819/

Let's stick to the facts. Not science fiction.

Answer 3

All the time we are learnig that the conditions under which life can exist are much broader than we ever expected. The temperature range for life currently ranges from -180C to over 120C, not so long ago the range was over 0C to under 80C. Also the energy inputs to sustain life have widened, not only sunlight but also minerals can initiate and sustain eco systems. (the vent communities in the deep ocean for example). Further the life span of living organisms is considerably increased, some simple bacteria are now acknowledged to be able to survive millions of years. So even if life originated only on this planet inthis solar system, there is every chance that it has migrated to other planets all by itself under fairly normal event. So some earthlings may well have colonised Mars. Equally likely is the suggestion that our ancestry goes back to Mars, via some primitive microbe.
Given the quite divers conditions that permit life, it really is to be expected that it will be found to be quite common. We havent found any extra terrestial life yet, but then we havent visited any other planets yet, and certainly no other solar systems.
The universe is not infinite, but it is incredibly big. There are so many stars out there with solar systems that there are just in our local galactic group billions of other planets all with the necessary conditions for life, so even if formation of life was a billion to one chance, then we would expect, a lot of life in our neighbourhood. We just haven't been looking yet.

And as has been pointed out, life need not be restricted to carbon based life forms. That further extends the possible range of habitats. Though we might have to ammend our definition of life to accommodate some of the potential candidates.

Are inteligent life forms likely to be bipedal, 2 eyes? Not really, but its a hell of a lot easier for costume designers to dress up humans to look like aliens than to build weird animatronic aliens, hence movies tend to show humanoid forms. Besides its probably not so exiting to watch the advance of the intelligent mushroom, at 12mm per year.

Answer 4

There are more stars out there than there are grains of sand on Earth. Many of those stars will have planetery systems like our Sun. Some of those planets will have conditions in which we know that life can exist & evolve. It is inconceivable that there is not life elsewhere in the Universe.

Answer 5

probably, yes.

There is a school of thought that the Universe is infinite -- at at least we know that there are many billions of planets.

It would seem just too much 'against the odds' that this planet is the only one whre the conditions have arisen to allow life to begin and evolve.

So it seems likely, by the Law of Averages, that there would be other planets where a combination of Carbon and Oxygen, in the right amounts, with other chemical and electric inputs have evolved some form of organic life.

However there is also the possibility that "life (Jim) but not as we know it" may also have evolved elsewhere.

In an infinite Universe, as far as I can see, as some point every possible combination of chemistry that could engender life-forms should at some place and time occur.

In simple terms IF the Universe IS truly infinite...then there should, by definition, be an infinite number of planets that host life also...(we are the proof of this -- we exist, therefore by definition an infinite number of similar worlds must exist).

(However -- it seems unlikely that the Universe is truly infinite -- only relatively so, in terms of its vastrness compared with one insignificant world like Tellus.)

Answer 6

Hi. Our current technology is unable to determine whether life exist on other planets.I don't think we should assume there is life without some evidence other than saying there must be because we cant be the only ones in the universe.If we were created by God then i believe we are the only ones in the universe.
Cheers.

Answer 7

no, scientist haven't foudn any life on any planet yet, somehow scientis bellive there are very little marzian living under ground, well the scientist have found a new planet lately call teh 581c they said it was earth liek tempretures, but they don't knwo if there any life yet.

Answer 8

Probably Yes. Even in our own solar system. My guess is in bacteria form. Check out this article about Gliese 581C. The word is that there is a good chance there is like there.

Answer 9

The way I always answer this question is a follows:

If life does not exisit anywhere else in the universe, then it is a huge waste of space.

Answer 10

Life is endemic throughout the Universe.