[Zabra]

HAhahaha !!!

Spoiler:

[13295]

what's that in your spoiler? image or link?

[Justice_mybb_import8175]

The universe is never ending my friend, its a place where you mind expands and life is free with no rules.

[Frooxius]

Jacob: That's not exactly true what you said exactly, let me explain it to you, not in big detail though, I'm not an astronomer/physicist.

the unieverse is forever expanding right now.

Whether the universe will explain forever is actually unknown, there are several theories about that. One predicts, that it will keep expanding indefinitely so over the time, as the complex structures decay (starts burn out) and get far away from each other, the entropy ("organization" of the matter within the universe) will increase (the universe will be more or less uniform), so it will become cold and vast and basically almost empty.

The momentum from the big bang is still causing the universe to expand, and everything is getting farther apart from each other.

First, you can't talk about momentum that applies only to physical objects, because momentum is calculated as a product of object's mass and velocity. What is expanding in the universe is actually the space. You probably imagine the universe as an sphere, that's growing larger and larger, but that's probably not correct. For imagination, imagine, quite ironically, a spherical balloon, with dots on it. As you blow that balloon, it gets bigger and the dots get further form each other, the space expands, but the universe is represented only by the two-dimensional surface, while something similar happens with our universe, but in three dimensions (probably just three?).
That also means that universe might actually wrap around itself, so if you go in one direction for long enough (and that's REEEEAAAALYYYY long enough), you eventually arrive at the same spot. Imagine walking on a sphere, like Earth (though it's only roughly spherical) in one direction, you eventually wrap around and arrive at the same point, so now imagine the same principle with three dimensional surface on a four-dimensional sphere. Or torus. Or cylinder >:3

So which means for example, in a matter of time, the earth will be too far from the sun for heat, and the earth will freeze

That's not actually true at all. The Earth is bound to the Sun by the gravitational force which is in turn bound to the galaxy by the gravitational forces. So while the universe expands, local clusters of matter don't move away from each other due to the expansion - the expansion is not enough to separate them and have any significant effect on such relatively small case.

In fact, the exact opposite is going to happen with Earth. As the Sun will burn all its hydrogen, it will begin to burn more heavier elements, like helium, which will increase the expansion force (there are two main forces in a Sun - expansion, because it's basically gas "blowing up" - exploding if you may and the gravitational force that tries to contract it into smallest point possible, so the Sun (or any star) stabilizes at certain size, where the forces are more or less equal), so the whole Sun will expand greatly, most probably will engulf Mercury and Venus and if not Earth, it will make it a molten rock. Eventually, it will shed the upper gas layers and only a small brown dwarf will remain, so the Earth will freeze at that point, but not due to expansion of the universe.

and the closest star to earth aside from the sun prozima centauri(something like that) and its roughly 4.3 light years away from the earth. Meaning, any light that it emits, take roughly 4.3 years to hit the earth. At that rate, it'd be rather weak.

Proxima centauri (proxima, like the word proximity - it's close to us). There's no reason for the light to be rather weak when it arrives to us assuming there are little obstacles, that would diminish its intensity (like object, that would absorb the light, even huge clouds of dust). Remember the laws of thermodynamics - no energy can just "disappear", so it doesn't get really weaker by distance.

The reason why it's weak is because we're getting just very small portion of it - the light expands in all directions, which basically forms a sphere, that's getting bigger and bigger with the increasing distance, so the emitted energy has to expand to larger and larger surface. It doesn't get weaker itself, it is simply expanded into larger area and we cover very small amount of it, so only small amount of it will hit us.

By the time the earth is too far from the sun to continue getting heat from it, to support substantial amounts of advanced life, we will not be close enough to our neighbor star to start leeching its heat, as we'd need to be very close, its about 1/8 the size of the sun, 40 times more dense, and less than half luminous.

Like I explained above, this is incorrect. Opposite will happen, Earth will burn as the sun will expand, we don't get further from the Sun due to the expansion of the universe. There's absolutely no way we could even get near Proxima Centauri, as we're about 8 light-minutes from the Sun and 4.2 light-years from Proxima Centauri. 4.2 light-years * 356 * 24 * 60 * 60 = 129185280 light-minutes and if we compare that with 8 light-minutes with our Sun, it's obvious that the distance ratio is just huge, so it's preposterous to even think of getting close to it somehow (there's no force drawing us directly to it to begin with).

You'd think the gravity from all the matter and dark matter in the universe would be enough to pull it back to, and the universe would collapse on itself, yet its quite the contrary, even due to the ex-amount of dark matter that existed in the universe at the time of birth.

Actually, it is possible for the universe to contract that's the other theory, called big crunch. It is unclear which one is true at this moment, they are still theories. Another similar one theorizes that universe is basically going in a cycle and after it collapses back into singularity, it will begin a new cycle with a new big bang. This theory is called big bounce.

I think that it won't contract because of gravity (or only because of gravity), there are other factors that influence this. Especially if you consider how huge are the spaces between galaxies for example and they're almost empty. There might be dark-matter/energy, though we know very little about that and I think that it's more concentrated into galaxies.

i apologize for going off track for alittle, i enjoy reading, watching, and studying astronomy and wonders of the universe xD

(ive dedicated over 200 hours to watching Universe documentaries on netflix...alone.)

That's nice, though some of the information you presented is quite incorrect and distorted. I'm not sure if you misunderstood, forgot over time, or they actually fed you some wrong stuff in the documentaries.

I may recommend a book though that's really good on this subject and trust-worthy: A Brief History Of Time by Stephen Hawking.

[wallykillaz]

lol look at this http://imgur.com/gNqn9 lololololololololololololololol