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Life on other planets

Exactly what it says on the tin. I hope to start a good discussion on it, because it pretty much is the biggest question out there now.

I personally believe in other life, besides the life on this planet. Think about it: there are millions of galaxies. In each of these galaxies, there are millions (probably billions) of stars. Considering there are nine planets around our star, that means there are probably thousands of billions of planets out there. How could this place be a "freak" accident? How could to be unique? Infact, it's likely that life is very common in the universe; and one moon orbiting Jupiter might have life on it as well.

As for intelligent life out there... that is a different question. I'd say that intelligent life would be rare-ish; considering everything that can happen in a planet's development, it's possible that there might be only one planet with intelligent life in every couple of solar systems in a galaxy.

As for types of life... I'd say that our imagination is far too limited to imagine what other life forms would look like, or how they adapted to life on there planet. I'd hardly say all life would be carbon-based; or would require oxygen, or would require water. I'd also say that any creatures we would meet would be radically different; considering that our imagination is fueled by the things around us, I would't be surprised if our imagine of other intelligent life forms is compellingly wrong.

Anyway, that's my views, and if anyone else as anything to add, that would be great.
Originally posted by BlackMageMario
Think about it: there are millions of galaxies


Pretty much this. Earth is just a speck of dust in the universe. How can there NOT be intelligent life out there? There HAS to be some sort of intelligent life forms out there. We seriously can't be the only ones.

I'm quite sure there is life on other planets. There probably might even be intelligent lifeforms out there. There will probably be some smarter or less smarter lifeforms then us.
The universe is so big, that it would surprise me if there wasn't any lifeform other then the lifeforms on our planet.

Will we be meeting the life sometime?
Only time can tell, but I don't think that will happen soon.
We would need better technology to be able to go beyond our milky way in a reasonable time, and even with the speed of light I think it would take quite a while.

It could only happen soon if some other lifeforms decide to visit us, or if we somehow overlooked lifeforms in our own milky way.

Obviously, there's also the question rather it would be good or bad if we would meet other intelligent lifeforms, but that's not something for this thread.







   

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Regarding this topic, I'd like to come up with the following paradox:

There's a huge amount of possibilities for atoms forming compounds, but compounds forming life as we know it, even protozoons only, is hardly probable. Then again, the universe is infinite, so atoms and compounds are, too. Thus, the chance of life forming gets raised ever and ever, so there has to be other life out there.

Sheesh, that was harder to explain in a different language than I expected :/ Hope you guys can even understand what I mean.


I don't think there's other life in our solar system though and I don't see us meeting other life at all. Life on planet Earth will be extinct long before we had the abilities to travel or send robots far enough.
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Well, it's definitely possible if other solar systems(aside from ours) have a Goldilocks Zone, as silly as that sounds, but that's basically what Earth is in the middle of, Venus is too hot, Mars is too cold, but Earth is just right, and if other solar systems have such a zone like this, it is quite livable, but again, this also depends on other things.

Maybe an asteroid belt of it's own, one of those must have sustaining life forms on them, and out of luck, those asteroids land on that Goldilocks's Zone planet, beginning the slow process of forming life, maybe intelligent life forms? Maybe not, who knows, it just depends on the planet.
But, again, there are also soo many types of life forms that can survive in harsh climates, so we may never know.
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Originally posted by exit1337
Life on planet Earth will be extinct long before we had the abilities to travel or send robots far enough.


(this is going to go a BIT off-topic, but I think it'll be on-topic enough to justifie it)

I'm not sure about that. I personally think that people will EVENTUALLY realize that we are destroying the planet, and we will replace fossil fuels with solar, wind, water, whatever else, etc. (Whether that will happen because of a major disaster, or the oil running out... that I do not know.)

As for the abilities to travel, I personally think that it is possible to fold space (sort-of like in... Star Trek, I think? (I said this before in another thread, and I was wrong, but I SWEAR, the place I found this theory said it was like how they traveled in Star Trek)), and so, bring your destination closer and where you are leaving further behind.

Then again, that might not work, so we might have to go about it the long way.

- BlackMageMario
I know this sounds crazy, but I kinda think there are FUTURE versions of us out there somewhere. Like in another universe.
Also, if the universe is a googolplex wide, I heard that it's impossible for there NOT to be an exact copy of YOU out there. So perhaps now, there ARE some intelligent lifeforms that have to be out there somewhere. Like Bad luck man said, the universe is GIGANTIC. We can't be the only ones here.

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Let's take a look at some variables for a planet to be able to sustain life.
  • Must be in the Goldilocks Zone of the star it orbits. This is impossible for interstellar planets since they don't orbit a star.
  • The planet must have carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur[1]
  • The planet must have an atmosphere thick enough to protect the planet from harmful UV rays emitted by its star.
    • Additionally, the atmosphere mustn't be toxic to life forms. If it is, a mutation to overcome this must occur.
    • If at first the atmosphere is toxic to life forms, an ocean should suffice until such a mutation occurs. This mutation will not matter if the planet has no land.
  • The planet should have some kind of magnetic field to protect the atmosphere from solar winds, much like Earth.

Aside from that, there's a bunch of wildcards. Perhaps there's a planet where all water is in the form of water vapor, making the ocean the sky. Perhaps there's a planet surrounded in a red haze. Perhaps there's a planet made entirely of gas (that's livable; not like the gas giants of our solar system). The possibilities are almost endless. How many planets out there can and do support life? Probably billions. How many support intelligent life? That's a little tricky; it depends on your definition of intelligence. It's unlikely that we'll make contact with aliens any time soon, but if we do, it'll be an event more momentous than the discovery of fire. Hopefully they'll be friendly. If not, kiss the human race goodbye. We'll have lost in the great battle that is survival.
Originally posted by 0208Z
Also, if the universe is a googolplex wide, I heard that it's impossible for there NOT to be an exact copy of YOU out there.

This does not make any sense; there is no reason that an exact copy of anyone has to exist anywhere, nor is it likely. I'd like to know exactly where you heard this.
Originally posted by K3fka
Originally posted by 0208Z
Also, if the universe is a googolplex wide, I heard that it's impossible for there NOT to be an exact copy of YOU out there.

This does not make any sense; there is no reason that an exact copy of anyone has to exist anywhere, nor is it likely. I'd like to know exactly where you heard this.


It's acutally quite simple.

It goes off the idea that there is only so many possible ways the specific molecules that make up "you" can be arranged. Theoretically, if you go far enough, you can break that finite barrier and start seeing molecule combinations that resemble you. Of course, that's the version i learned in class one day.
Later.
Originally posted by ShadowFire
Quote
...


It's acutally quite simple.

It goes off the idea that there is only so many possible ways the specific molecules that make up "you" can be arranged. Theoretically, if you go far enough, you can break that finite barrier and start seeing molecule combinations that resemble you. Of course, that's the version i learned in class one day.

But that would require the lifeforms on a planet to be identical to the lifeforms on earth (unlikely); it would require the said lifeforms to evolve into something identical to humans (even less likely); and then it would require a member of the said species to have the same DNA as you. Not only that, it would also need to grow exactly how you grew. While it's a possibility, the universe isn't infinite; without solid proof, there are no grounds on which you can say there *IS* someone who looks just like you. It would be far more likely for there to be an exact copy of you here on earth. Usually in the form of identical twins, not random doppelgangers.
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If the universe is infinitely big (which we might as well just say it is, considering it just keeps "growing" all the time), the chance of infinite carbon copies of yourself existing or existing in the future is 100%.
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I think that we're definitely not the only ones in this universe. Even more, I think there might even be out there somewhere creatures that can be even more intelligent than us. Pretty much a rare case, but that's not impossible.
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Well there may not be one copy of ourselves in this Universe, but let's think about other Universes, it is possible for that. "How?" you might say? Well, here's my own theory about how Black holes are related to the Big Bang: We all know how Black hole's sorta work, right?
Well, there is no way, for all of everything it get's sucked into it, to just "disappear" forever, or never to be found again, because there's always a Positive and a Negative, like say for example, you dig a hole, there is a hole there(that being a negative) but there is also a pile of dirt next to it(a positive, this is simple stuff), so now let's look at Black holes this way, they suck up everything as far as we know(time, space, all matter ect ect..), so all that was there is now gone(the negative; vast emptiness that was once there).
Where does it all go? To either another Universe, or forming a new Universe, which I think is how our Universe came into the big picture, because most people have said(or from what I heard) that there was no "time, space, matter ect ect.." before the Big Bang, so that's why I thought of this, since Black holes "dig" up everything from one Universe it must go somewhere, either it be tossed in another Universe or form a new one, like maybe a Black hole did from another Universe, and on the other end of it formed our Universe(which didn't exist before).

So, that's just what I think might be possible, it's not proven to be true or whatnot, it's just what I hear, and I figure out my own way to put the puzzle pieces together, and come up with the theory. Now I know I kinda went off the subject, but it's still related to it, because in the other "possible" Universes, there may be smarter life forms there, or a copy of ourselves(possibly doing the opposite of whatever choices we made in our lives). But again, who knows, that's just my two cents.
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Originally posted by moltensnow
Let's take a look at some variables for a planet to be able to sustain life.
  • Must be in the Goldilocks Zone of the star it orbits. This is impossible for interstellar planets since they don't orbit a star.
  • The planet must have carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur[1]
  • The planet must have an atmosphere thick enough to protect the planet from harmful UV rays emitted by its star.
    • Additionally, the atmosphere mustn't be toxic to life forms. If it is, a mutation to overcome this must occur.
    • If at first the atmosphere is toxic to life forms, an ocean should suffice until such a mutation occurs. This mutation will not matter if the planet has no land.
  • The planet should have some kind of magnetic field to protect the atmosphere from solar winds, much like Earth.


While this is definitely true, and I hole-heartily agree with you, those variables are only necessary for organic, or possibly, earth-like life. Who knows? Maybe there are creatures out there who live on planets without one or all of those variables. And if an intelligent race creates either a) robots who's basic command is to "survive and build other robots" or b) has the qualities of intelligent life, we might encounter an ecosystem with robotic life on it.

- BlackMageMario
If there is other life,either it died out or hasn't arrived yet, universe time compares the same as its size, the chancs of life at similar stage is very unlikely, on top of life being "uncommon"
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The Universes infinite expansion, couple with the infinite separate dimensions that contain and infinite amount of realities causes me to agree that there is life on planets not of our own.
Logic suggesting we're the only life forms in the universe is near impossible... With how large the universe is, and how little of the universe we've "seen"... it's almost guaranteed there's SOME kind of life out there somewhere. It wouldn't make any sense any other way. There HAS to be.
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