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genchev wrote:.... Also I know that on a satellite of Jupiter was discovered ice -> water -> life ...

with such temperature like on Jupiter water is a solid mineral )))

Some scientists believs that ammonia is the possible base of the life there. But that life is so distinguish from ours that robots even won't understand that they just have found some biological form.

genchev wrote:The space is unlimited

Are you sure?

he's not sure :}

I think the Universe is finite, simply because I, as a human being, can't imagine the concept of infinity (except in math where it's easy to work with).

Boso wrote:

genchev wrote:The space is unlimited

Are you sure?

That's one of the discussion like "What's first ? The chicken or the egg ?" type. There're many opinions about that question but I think that everything has an end except space

Looks like only time will tell, as technology advances further I do want to live on the moon though!

This is not like the "chicken or the egg" paradox.
And no, time won't tell.

Technology can advance all we want, but it won't theoretically be possible to see over the hard limit of observable Universe the laws of physics imposed on us.. We are never going to be able to see more than a chunk of Universe surrounding us, and without any info, we have no way of knowing whether this chunk is a just a tiny part of the Universe.

The hard limit does get increased with time, but we will never be able to see anything beyond it.

Because nothing can travel faster than the speed of light, if our universe is 13.7 billion years old, we can't see farther than 13.7 billion light years.

(when I say see, I don't mean we have the technology to see it now. Also, I use "see" methaporically, because astronomy doesn't rely on the visible light..

I didn't necessarily mean the depth of space, but I do thank that in due time we will find other life somewhere outthere.

I'll add something to my previos post: there's also a possibility that our physics might be wrong.

Finding another life... maybe in couple hundred years.

zogo wrote:Technology can advance all we want, but it won't theoretically be possible to see over the hard limit of observable Universe the laws of physics imposed on us.. We are never going to be able to see more than a chunk of Universe surrounding us, and without any info, we have no way of knowing whether this chunk is a just a tiny part of the Universe.

The hard limit does get increased with time, but we will never be able to see anything beyond it.

This is a contradiction to your previous statement that the universe is finite. With this statement you say that the universe must be infinite. If it was finite, then at some point we would reach the border.

zogo wrote:Because nothing can travel faster than the speed of light, if our universe is 13.7 billion years old, we can't see farther than 13.7 billion light years.

This is what Einstein said in the special theory of relativity, but it's obsolete. It has been overruled by the general theory of relativity, which does allow over-light-speed, so this statement also doesn't hold.

Heh, that's not what I wanted to say :)

I said I think the Universe is finite, because there is no way for me to imagine anything infinite. Just because we can't see farther than our 'limit' doesn't mean the Universe is infinite. I was told the Universe is in fact infinite, I just can't "see" that. Besides, our observable Universe is not the whole Universe - it might still be finite. Man, I don't know ;]

My understand of the theories of relativity is a little different. My limited knowledge of the general theory is that it explains the relationship between matter and spacetime.

Some ppl really believe that ufo make users do such things

zogo wrote:Heh, that's not what I wanted to say :)

I said I think the Universe is finite, because there is no way for me to imagine anything infinite. Just because we can't see farther than our 'limit' doesn't mean the Universe is infinite. I was told the Universe is in fact infinite, I just can't "see" that. Besides, our observable Universe is not the whole Universe - it might still be finite. Man, I don't know ;]

It's better not to make assumptions here. Just leave this question open for the future, until someone could prove that the universe must be finite/infinite. This might not happen though, but wrong assumptions are worse than no assumptions. =)

zogo wrote:My understand of the theories of relativity is a little different. My limited knowledge of the general theory is that it explains the relationship between matter and spacetime.

The theory is far more general and thus covers most subcategories of physics. The old special theory didn't allow over-light-speed. Then it has been generalized and the general theory came up, which does allow it.

hey, of course we're not alone in the limitless space...there are thousand of planets like ours
but, until we find some cute aliens, the question "are we alone in the space" remains unanswered

Some people even believe that life is not natural on earth, and that the first backteria was in fact 'transplanted' here by some means, ie. a Noah's Ark model or merely a meteoroid/comet.

They claim that this is why it took about 3 billion years for prokaryotic life to form, but only another billion for complex organisms to arise.

Is it right? That's to be debated, however it does raise some intresting questions.

Well, I'm not one of those people ;]

Thanks mm_freak. I'll look into it and I'll scream at my astronomy teacher.