Forum posts made by courtneyxoxo

Topic do you believe in God?
Posted 24 Jan 2014 13:03

“Live a good life. If there are gods and they are just, then they will not care how devout you have been, but will welcome you based on the virtues you have lived by. If there are gods, but unjust, then you should not want to worship them. If there are no gods, then you will be gone, but will have lived a noble life that will live on in the memories of your loved ones.” - Marcus Aurelius

I personally don't want to spend my life believing in something we have no actual evidence for, so I don't. If some actual evidence came out that couldn't be explained with anything other than "God did it", then I might be open to believing

Topic Why is the universe so big?
Posted 08 Oct 2013 09:20

If black holes are sucking in all this light and matter, is it possible that dark energy and dark matter is in black holes?

Assuming you had a black hole big enough, dark matter would get sucked in to a black hole in the same way normal matter is. Dark energy on the other hand isn't really a thing. It isn't something radiating out from a central point pushing everything else away, it's just a name given to explain why distant galaxies are accelerating away instead of slowing down. So it can't be sucked into black holes.

Topic Why is the universe so big?
Posted 05 Oct 2013 01:06

Ah I've just read about this. It's Hubble's law? So they thought it could be positive, negative or zero, right? But like you say, gravity can't overcome the energy, so it will expand forever.

OK, what do they mean when they say time was created by the big bang? Will time disappear when the universe reaches a certain size, if it's infinitely large?

The expansion of the universe is measured by Hubble's law, but they weren't trying to work out if that was positive, negative or zero, since they know it is around 65. They were trying to workout if it was increasing, decreasing, or remaining constant.

I don't remember learning about exactly why time was created in the big bang, but my way of thinking about it is that time is a measure of the rate of change, and before the big bang there was no matter or energy anywhere in the universe, so there was no change, so it would be impossible to measure time.

Topic Why is the universe so big?
Posted 04 Oct 2013 14:06

OK, some questions..

How can there be more than one universe? If there is and I can't get my head round that, is there a chance they could run into each other? if they did, what would happen?

So, apparently as has been established, the universe is expanding. It's something to do with the amount of matter and energy, but we can only account for so much of it, and the rest we know is there but we can't see it, is that right? And then it's expanding, but based on one model it will expand forever? That makes my head go all muzzy! What's making it expand? I guess it's from some energy and if it is where is the energy coming from, if it's going to expand forever? Surely, it's going to run out of steam sooner or later and if not, why not?

I've got more questions, but that's probably enough for now.

The more than one universe thing is complicated and has something to do with string theory, but all you really need to know is that anything that can happen, will happen in some universe. One of the laws of the multive5rse theories is that there is no was to travel or communicate between different universes.

The universe expanding thing is really weird (like just about everything in cosmology). One way you can think about it is that there was a really big explosion (the big bang) and everything was forced out away from the center, and since there isn't anything to slow it down, it's still moving, hence the expanding universe.

It might not run out of steam, if it has reached escape velocity, then the force of gravity won't ever be enough to slow it down to a stop, so it will keep expanding forever.

Then there's the theory about dark energy, which is causing the universe expansion to accelerate, but that's about all we know about it so far.

Feel free to ask more, it's nice being able to talk about something I know on here.

Topic Things you don't understand even when they're explained to you.
Posted 13 May 2013 14:46

"Why is the Earth a sphere and not a shapeless lump of rock?"

As I understand it, the earth started of as a shapless lump of rock and over time the force of gravity forces it to compact, and as it does so it shifts around to make thew force equal on all of it, and the only way to do that is by becoming a sphere.

Topic Have you ever masturbated at work?
Posted 11 Dec 2012 16:27

Not at work but I've tried it a couple of times in class, my friend next to me noticed but I don't think anyone else did