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post #31 of 68 Old 04-12-2012, 07:06 PM
EZAces
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Because of the Doppler Effect, it is believed that some galaxies are traveling away from us at speeds close or faster than light so we cannot see them, so there would be no way for us to tell how big the universe is.fficeffice" />>>


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post #32 of 68 Old 04-12-2012, 07:36 PM
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And it's only going to get worse. It's strange how lucky we are as a species to have developed the technology that we have right now, right now. The density of matter in the universe drops off as it expands, while the energy density of empty space (or cosmological constant) has stayed constant forever. Plot that on a graph and you'll see that matter (y) eventually intersects the cosmological constant (x) at around the 10 billion year mark, when the numbers were just balanced enough for matter to form galaxies. If the cosmological constant were greater, galaxies could never form because of the repulsive forces involved. If it were less, we wouldn't even exist yet (factor in cellular life and evolution on top of that) and nor would galaxies because matter would be too spread out from acceleration to attract and form large enough blobs of mass to even form galaxies.

Eventually, all we'll be able to see are the stars from our own galaxy because everything will have accelerated so far away that we can't see anything else. Even the microwave background of the big bang will be undetectable. It'll be like 1915 all over again when we thought the Milky Way was 'the universe'.
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post #33 of 68 Old 04-12-2012, 08:57 PM
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Well, space isn't what matters. Space is just that, space. Space is mostly empty...
As far as we can confirm. There are theories of dark energy & matter which we don't have the technology to detect. It goes back to the balance of energy. For all the detectable matter in existence, there must be an equal amount of anti-matter.
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Because of the Doppler Effect, it is believed that some galaxies are traveling away from us at speeds close or faster than light so we cannot see them, so there would be no way for us to tell how big the universe is.
We think of the speed of light a the cosmological speed limit. Most people don't realize things can "go faster". Like two bodies travelling at the speed of light in opposite directions. In relation to body 'A', body 'B' is travelling at twice the speed of light
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post #34 of 68 Old 04-12-2012, 09:26 PM
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Quote:
Originally Posted by mike_dippert
As far as we can confirm. There are theories of dark energy & matter which we don't have the technology to detect. It goes back to the balance of energy. For all the detectable matter in existence, there must be an equal amount of anti-matter.
The dark matter theory is pretty wicked. Its been awhile since I've done any reading on it, I may have to see if there has been any significant improvement on it.

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post #35 of 68 Old 04-12-2012, 10:11 PM
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post #36 of 68 Old 04-13-2012, 01:02 AM
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Another thing kind of interesting here, Earth is only approx 4.2 billion years old and we can view galaxies 10-14 billion light years away right now. So if someone in one of those far away galaxies were looking right back at us then they would see nothing because the planet earth doesn't even exist in their view yet. They are further away than even the creation of earth's image has traveled at the speed of light.


If we actually had the technology to place a mirror out in space lets say 1 light year away and we were able to clearly view our reflection in it, the image you see would be 2 years old ( 1 year to get to the mirror and 1 year for the reflection to return) We would simply see ourselves in the past. Technically everything you see is viewed in the past, it might be only a couple nano-seconds old, not really worth considering the past, but it is. Even our sun is viewed at an 8 minute delay, it takes 8 minutes for sunlight to reach earth.
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post #37 of 68 Old 04-13-2012, 05:46 AM
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It will get interesting when we further develop our understanding of the space-time fabric. If it can be 'torn' to do what we want, aka travel immensely large distances in a fraction of the time it takes. But even if we could, what would be there? Everything we see is several thousand light years away, meaning everything else in our observable galaxy may not even be there, just black matter. And what if we were to travel past the effects of gravity from even the largest of stars, where even their own light has not touched? I dunno, thinking outta my arse right now.

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post #38 of 68 Old 04-13-2012, 06:00 AM
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Check this out if you want to try to gain perspective on the scale of the universe. You can click on each thing to learn more.

http://htwins.net/scale2/scale2.swf?bordercolor=white


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post #39 of 68 Old 04-13-2012, 10:05 AM
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Ding ding ding! And only 18 posts in.
I'm just here to keep it real! LOL

Just a traveling cat in a tall black hat riding a goat. Nothing to see here.
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post #40 of 68 Old 04-13-2012, 11:10 AM
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It really is insane. How does that not make one feel insignificant!?

Really want to feel insignificant watch this!



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post #41 of 68 Old 04-13-2012, 11:56 AM
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post #42 of 68 Old 04-14-2012, 01:05 AM
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This topic always makes me think, that if we only use 10% of our brains... and we are capable of some astonishing (to us) things, just imagine the **** that would happen if we were able to use even 60% of our brains potential.


Where is the key to unlock this ability? Why are we only using 10%? How do we access that other 90%, and then maybe... will we be able to comprehend even a fraction of the universe?

What would happen if we had access to 100% brain capacity? Is it because our bodies can't handle the amount of power drain a brain running at 100% would take? Is it because we don't have enough energy to utilize it?


I'm about to shut down trying to comprehend all this...

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post #43 of 68 Old 04-14-2012, 09:02 AM
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Originally Posted by SunDevilJeeper
This topic always makes me think, that if we only use 10% of our brains... and we are capable of some astonishing (to us) things, just imagine the **** that would happen if we were able to use even 60% of our brains potential.

Where is the key to unlock this ability? Why are we only using 10%? How do we access that other 90%, and then maybe... will we be able to comprehend even a fraction of the universe?

What would happen if we had access to 100% brain capacity? Is it because our bodies can't handle the amount of power drain a brain running at 100% would take? Is it because we don't have enough energy to utilize it?

I'm about to shut down trying to comprehend all this...
It's because we haven't evolved enough yet. Our brains are the same size as they were 2000 years ago, yet your average human has difficulty comprehending basic physics or math. Those concepts have been around for 300 years, beginning physics & calculus should be high school classes.

[something as simple as figuring a 20% tip, I know a lot of people that can't do it mentally, but it's one of the easiest things to do]

I think we're actually using LESS brain power thanks to computers.
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post #44 of 68 Old 04-14-2012, 11:17 AM
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You already use all of your brain. Just for different things at different times.

If your average person could actually access all of it, odds are they would forget to breathe and die.

...
...
Ok, we need to find a way to make this happen.

I'm the only gay eskimo.
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post #45 of 68 Old 04-14-2012, 05:40 PM
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Quote:
Originally Posted by mike_dippert View Post
It's because we haven't evolved enough yet. Our brains are the same size as they were 2000 years ago, yet your average human has difficulty comprehending basic physics or math. Those concepts have been around for 300 years, beginning physics & calculus should be high school classes.

[something as simple as figuring a 20% tip, I know a lot of people that can't do it mentally, but it's one of the easiest things to do]

I think we're actually using LESS brain power thanks to computers.
Yeah that's something I didn't really think about. Good input! Kinda seems like the further technology advances, we get smarter, yet dumber at the same time.

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