The universe

[Dharok]

The visible universe contains over 500 billion galaxies, each with a chance of life and intelligent civilization. We as humans are merely a grain of sand in a cosmic sea.

[joe Biggs]

indeed the universe is big...

but just because its big doesnt mean other planets have any life forms

// wants beyond the edge of the universe?? (logically it cant extend for ever and always)

[MoreBudzForMe]

I once had the idea that all the stars in the sky are just the sun at diffrent times in the past. Like the pac man effect.

[Rotawee]

I'm with you on this. There just can't be the chance that us humans were the only lucky ones in the universe graced with such a beautiful life supporting planet. There just has to be life out there, even if it is just a microbe.

[codybridges69]

Yeah, of course there's life on other planets. It just doesn't make sense that we are the only living beings in the whole universe.

[Blix]

Originally Posted by joe Biggs

indeed the universe is big...

but just because its big doesnt mean other planets have any life forms

// wants beyond the edge of the universe?? (logically it cant extend for ever and always)

There is no edge of the universe. It just wraps around to where you started
from again.

Think of the universe as a bubble floating around in the higher dimensions and
we all exist on the surface of the bubble.

[the roach]

Originally Posted by Dharok

The visible universe contains over 500 billion galaxies, each with a chance of life and intelligent civilization. We as humans are merely a grain of sand in a cosmic sea.

Neat, huh?

[joe Biggs]

i disagree that there HAS to be other life besides on this earth.

we are so lucky to be exactly far away from our sun, exactly close enough to our unusually large moon, our solar system be exactly far away enough from any other stars, a non toxic and thick enough atmosphere to support life, water and stability for evolution

u think this is going to happen again in the universe

and even if a different form of life was able to be supported w/o water, or even if another planet did have water. it doesnt mean there life system is the same (atoms-molecules-cell-organ-organism) and it also doesnt mean evolution worked in the same way or even exist there. or IF they exist they could even be so different that we dont understand its a life form at all

//o and the bubble as the universe theory there has to be something outside the bubble...

[Rotawee]

Originally Posted by joe Biggs

i disagree that there HAS to be other life besides on this earth.

we are so lucky to be exactly far away from our sun, exactly close enough to our unusually large moon, our solar system be exactly far away enough from any other stars, a non toxic and thick enough atmosphere to support life, water and stability for evolution

u think this is going to happen again in the universe

and even if a different form of life was able to be supported w/o water, or even if another planet did have water. it doesnt mean there life system is the same (atoms-molecules-cell-organ-organism) and it also doesnt mean evolution worked in the same way or even exist there. or IF they exist they could even be so different that we dont understand its a life form at all

//o and the bubble as the universe theory there has to be something outside the bubble...

Our solar system (the 9 planets and the sun) has tons of water, just not in liquid form (ice or vapor). Astronomers think one of jupiters or saturns (can't remember which) moons which is covered in ice could have liquid water under the surface which could mean life. Now apply that to the other billions of solar systems unknown to us.

[joe Biggs]

one of jupitars moons

// were an 8 planet solor system

// and to contradict your theory for life to exist it has to be in liquid form at the average temp. of the planet to support life. mars has frozen polar ice caps but no life

[BAKED]

Originally Posted by joe Biggs

one of jupitars moons

// were an 8 planet solor system

// and to contradict your theory for life to exist it has to be in liquid form at the average temp. of the planet to support life. mars has frozen polar ice caps but no life

Whos to say that other organisms need water to survive at all. From our limited experience on Earth and with 8 other planets we can safely assume that all organisms need water to survive. But this might not be a constant of the universe. What about Silicon based organisms?

Hell, maybe on some other planet all the aliens drink gasoline and rich middle eastern aliens sell the world water the fill their UFOs with

[Rotawee]

Originally Posted by joe Biggs

// were an 8 planet solor system

and to contradict your theory for life to exist it has to be in liquid form at the average temp. of the planet to support life. mars has frozen polar ice caps but no life

Let me be the first to say WOW. you and about .01% of the astronomical community accept that. I guess for the past couple hundred years we were wrong and pluto. it just so happens its a perfectly round asteroid with a moon ....

You must have googled. How did you know mars has ice caps but still think there is no water in the universe except on earth. And you know we've found microbes in Antarctica frozen for thousands of years right? It doesn't have to be living for the proof of life.

[Jimbozu]

Originally Posted by joe Biggs

i disagree that there HAS to be other life besides on this earth.

we are so lucky to be exactly far away from our sun, exactly close enough to our unusually large moon, our solar system be exactly far away enough from any other stars, a non toxic and thick enough atmosphere to support life, water and stability for evolution

u think this is going to happen again in the universe

and even if a different form of life was able to be supported w/o water, or even if another planet did have water. it doesnt mean there life system is the same (atoms-molecules-cell-organ-organism) and it also doesnt mean evolution worked in the same way or even exist there. or IF they exist they could even be so different that we dont understand its a life form at all

//o and the bubble as the universe theory there has to be something outside the bubble...

First of all, the Earth hasn't always been so hospitable to life. We suspect that when life first evolved on earth, the atmosphere was must too hostile to support life. The earth most likely didn't even start off with water on its surface. Scientists theorize that the water that is now on earth came from 1 or many meteors that hit the earth during its early development. The atmosphere was most CO2, the temperature was probably much too hot for life to survive, and the pressure was many times higher than it is today. Life most likely began at the ocean floor, living off of the undersea vents. The earth didn't become habitable to life as we know it until primordial life transformed the atmosphere into the oxygen rich atmosphere we see today. It seems that life can actually survive in much harsher conditions than we live today.

Theres a possibility that on water rich titan, one of Saturns moons, supports some form of life. The moon is completely covered in Ice, which is miles thick (I'm not exactly sure how thick it is, its deep though). Because of the properties of water (it expands when it freezes) the immense pressures at the bottom of all that ice would cause it to melt and become a liquid. In this layer of liquid water organisms could survive off of the undersea geothermal vents much like they do on earth.

Because the universe is so big, the possibility that no other life exists goes to zero (if you've taken calc, you're essentially dividing by infinity)

//It you would like to know whats outside our perceived universe google or youtube "flatland" it should help to explain what is beyond what we can see (or perceive/understand).

[bkadoctaj]

Originally Posted by Jimbozu

First of all, the Earth hasn't always been so hospitable to life. We suspect that when life first evolved on earth, the atmosphere was must too hostile to support life. The earth most likely didn't even start off with water on its surface. Scientists theorize that the water that is now on earth came from 1 or many meteors that hit the earth during its early development. The atmosphere was most CO2, the temperature was probably much too hot for life to survive, and the pressure was many times higher than it is today. Life most likely began at the ocean floor, living off of the undersea vents. The earth didn't become habitable to life as we know it until primordial life transformed the atmosphere into the oxygen rich atmosphere we see today. It seems that life can actually survive in much harsher conditions than we live today.

Theres a possibility that on water rich titan, one of Saturns moons, supports some form of life. The moon is completely covered in Ice, which is miles thick (I'm not exactly sure how thick it is, its deep though). Because of the properties of water (it expands when it freezes) the immense pressures at the bottom of all that ice would cause it to melt and become a liquid. In this layer of liquid water organisms could survive off of the undersea geothermal vents much like they do on earth.

Because the universe is so big, the possibility that no other life exists goes to zero (if you've taken calc, you're essentially dividing by infinity)

//It you would like to know whats outside our perceived universe google or youtube "flatland" it should help to explain what is beyond what we can see (or perceive/understand).

What is beyond that which "flatland" can perceive/describe/understand/experience?

[joe Biggs]

to baked: in one of my first post on this thread i said "and even if life could be supported w/o water"

to rotawee: no pluto is not a planet, it isnt because:

to be a planet you must travel around a center sun(s), pluto cuts into Neptunes and maybe even Saturns orbit so it is an uneven ellipse

it also doesnt have a moon. a moon orbits around a central planet where as plutos moon and itself rotate around each other (almost like a figure 8)

and no i didnt goggle it i was taught it in school (both mars and the pluto thing)

to jim: that makes sense, but i want to point out i never said there isnt life, i simply said it is as well possible that there isnt.

yes i know life started in the ocean (thanks discovery channel) but idk about how the water got here (i know it is probable that a mars size planet in between earth and mars hit earth early one getting read of alot of the water, allowing for land life, and possible made our enormous moon with some spiraling of material of earth). and lastly i thought titan (the one w/ frozen water) was a jupitar moon but i could be mistaken