is there life on other planets?

Answer 1

I think it's nearly certain that there is microbial life on Mars and possibly Europa. We don't know much about planets that orbit stars other than our Sun, but it is likely that there is more out there to find.

So far, however, 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

Considering the size of the universe - most likely yes. There is life on earth because it is just the right distance from the sun , and the sun is just the right size and the earth is also just the right size to give us a habitable environment. There are trillions of stars in the universe and I can say with certainity that there is a similar sized planet, of similar distance, from a similar sized sun elsewehere and probably more than one! There just has to be mathematically speaking.
The problem is the universe is so big that it's unikely any intelligent life could ever reach us. Unless they can travel the speed of light - which itself is a problem.

Answer 3

According to both the laws of probability and the latest theories, each "solar" system that had the same planetary set-up, with the gaseous planets being the furthest away and the "earthy" ones close in should have a near-replication of outcomes on a Physics/Chemistry level, thereby making those "solar systems" without planetary life in the extreme minority. I also believe in this personally as it seems reasonable that we can't be so special that we're the only ones out there.

Answer 4

Yes, and we have been visiting Earth for eons. Over the centuries, your planet was a curious place to visit once or twice and was not considered very interesting . Sure, your wars showed us how undeveloped you are as a species. Your infantile,(in cosmic terms) dependence on god concepts does not bode well for you and neither does your penchant to breed beyond your planet's ability to sustain you. We are now showing an interest in you because it is not often that we get to observe a species commit suicide. You are so close to maturing as a sentient species and it will be a shame to see you kill yourselves. There are just not enough of you becoming rational enough to force the issue. You let the least among you determine your fate, so be it.

Answer 5

This question can be divided into several questions.
1. Any other planets exist ? Yes.
2. How life starts ?
3. What kind of environment at other planets ?
4. How life evolves?
5. Prove it?

Answer 6

This is a really detailed answer. It is derived from the Drake Equation. It calculates how much intelligent life we EXPECT to discover in our search for other life.

Equation: N= R.fp.ne.fl.fi.fc.L

where

N: the total number of civilisations in our galaxy
R: this considers the formation of new stars
fp: of those stars, how many have planets around them
ne: of those planets, how many are actually capable of supporting life
fl: of those planets that can support life how many actually do
fi: suggests that life is not good enough, it has to be intelligent life
fc: yet again intelligent life is only a start it has to be able to develop technology such as communications
L: of those planets that have intelligent life that can communicte with us, how many actually do

Consider there are 200 Billion stars in our galaxy. Let's suppose that only 1% of those stars could support life; and half of those had planets and half of those had planets that supported life. Of those planets, let's say one in five actually does support life and only one in a hundred of those support intelligent life. Among those intelligent species, one half are capable of sending signals but only one in fifty is actually doing so right now.

After all of that we are still left with 10,000 planets with intelligent life calling out to us. Now all we have to do is find them....

Answer 7

There is the very possibility of small bacterial life forms existing on mars and other moons (Saturn's, Jupiter's) in our solar systems, particularly because we believe water exists/existed in some of these places.

Based on that, with the billions and billions of planets, moons, and other heavenly bodies....I think the chances are extremely high that some other "life" is on other planets. Even if it's at microscopic form.

Answer 8

Yes the law of averages says the percentage of probility is so high there must be billions of planets with life in this galaxie alone. The percentage is lso high that there must be millions of planets much like our earth and with inteligent life much like our own. There is just too many star systems in our galaxy for there not to be.



Where conditions for life is met life will happen.

Answer 9

Yes, becuase the unierse is huge. Earth'd conditions are perfect and chances to get these conditions are very rare, but its one solar system. We may think that life requires moisture, air, etc... but who knows. So i say yes cuz if there's life even in one planet in a galaxy, there must be at least one in the billion others in this universe. Also life=inteligent: chances are low but hey won't have any resemblance to humans (and not the aliens in the alien movies either O.O).

Answer 10

I don't think any direct evidence of other life has been found yet, but I think they have found some evidence for the likelihood of at least microoganism-type of life on Mars....and the universe is so big, there has to be other life...
And, if you are religious, you believe in the existence of a creator, and unless the creator and all the angels and other spirits live in another universe, then the answer must be yes, in order to include them!!