I don't understand

[sooey]

If you think half a million muslims is scary wait till you see half a million scousers coming down your street. Like a plague of locusts.

 

[breadnbutter]

Heathens have the majority on here so it won't be long.

God did not send jesus to condemn the world ,but to save it.

 

[joinerjohn]

One thing from the program,,,, Scientists all agree the everything in the universe is travelling away from each other. ,,,,,, Yet scientist hypothesise that in a few billion years time, the Andromeda galaxy, will collide with our own galaxy (the Milky Way)
Can someone explain in simple terms , how something travelling away from our galaxy, can somehow, collide with it in a few billion years time????

Proof ??
http://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html

 

[EddieM]

One thing from the program,,,, Scientists all agree the everything in the universe is travelling away from each other. ,,,,,, Yet scientist hypothesise that in a few billion years time, the Andromeda galaxy, will collide with our own galaxy (the Milky Way)
Can someone explain in simple terms , how something travelling away from our galaxy, can somehow, collide with it in a few billion years time????

Proof ??
http://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html[/QUOTE]

maybe the centres of the galaxies are, but the arms will overlap in the expansion?

 

[sooey]

Not everything is travelling away from us, Andromeda is a galaxy which is part of our "local group" and is gravitationally attracted to our galaxy.
Like you said it's supposedly on a collision course with us and the two galaxies will eventually merge into a giant elliptical galaxy.
Our own galaxy has swallowed many smaller galaxies which were orbiting it, it's the main way that large galaxies are believed to form.

 

[chapeau]

Space,time or anything only exists in your conscious mind,when your dead nothing exists.Life really is mind blowing

Well not really, space/time etc also exists in mathematics and it's fair to say it existed before you were born as there is history. Hard enough to understand the physics without people lobbing philosophy in there

Well not really,mathematics only exist if you yourself exist as does history etc.

Well not really, mathematics exists even if everybody is dead. If everybody was dead then

1 + 1 = 2

(and you can change the language used but it will always be true).

You can prove things in maths. One hell of a lot of stuff was first discovered using maths then they built the machines to confirm the discovery. That big thing under the french/swiss border for example.

What we know about the big bang at around 10^-30 seconds (or thereabouts) is only found in the maths.

You talk about space/time. There are other dimensions about which we have zero concept. They make absolutely no sense to us as humans. However the maths says they exist, and they almost certainly do. We cannot get our heads around them, according to your argument that means they do not exist, and you are wrong.

 

[captaincaveman1]

If you think half a million muslims is scary wait till you see half a million scousers coming down your street. Like a plague of locusts.

 

[UriBentMySpoon]

If we start giving credence to the Bible and its Genesis story we have to give equal time to all the other creation myths that every society has come up with to explain their origins.

 

[UriBentMySpoon]

Hi UriBentMySpoon,
Novel mind concept but it doesn't quite work for me.
A singularity is just that - an infinitely small point, not a ring or a torus, so the expanding ring/torus breaks down for me. Note I say 'me' that is not to say it will not work for someone else.
Multiverses has a nice conceptual feel to it, in that the big bang could have produced many independent universes of which we have no concept and never will have. This will also explain why we cannot find the void which was the source of the big bang, as it is outside of our universe.
The mathematics produces the concept of multiple universes and multiple dimension, although I am not clever enough to begin to understand the mathematics involved.
Another area of debate for the Astro/Particle Physicists is the identification of Dark Matter. I have thought many times about this and have concluded probably rather naively, maybe the so called dark matter is there in great abundance but we can't see it as the light/radiation has reached us yet. Consider the fact that such galaxies could have been created say 500M years ago, but at a distance of say 501M light years from us, so we will start to see in in 1M years from now. Hey presto we can then account for any amount of Dark matter we want to.
All of this starts other thought processes, such as the mapping of the known Universe. I think we can only map what we can 'see' both in the visible and non visible spectrum. Even then what we see will in most cases no longer exist as we are seeing what was there in some cases Billions of years ago and there will now no longer exist and even if is does it certainly won't be were we see it today. So what we see no longer exists in a lot of cases and what does exist we can't see as the radiation has not reached us yet.
I think these confusions of mine were the reason I didn't follow Physics as a career after University. I just wan't clever enough.

Sorry, I think my language/metaphor caused some confusion there. I am not saying the universe is still a singularity, I was trying to say they are still the same "body" like I suppose the feotus is not the adult but one becomes the other and they are both the same event just at different points along the timeline.

From backing the galaxies back together we formulate the Big Bang, the mathematical models that work on this principal work well apart from the fact you need the Universe to have more mass than it does. This is where the dark energy/matter theory emerges from. With a hidden mass we cannot see, the mathematic models work, we just have to prove it exists, the other alternative is that we have got our mathematical models wrong and are barking up the wrong tree. This is where science comes in to try to find evidence, one way or the other.

The hypothetical thought the the Big Bang started of its own accord from a singularity does not sit well with me. I like the Big Bang which becomes the Big Crunch cycle to go on forever.

Whether or not multiple universes create/destroy each other, there is a thought that gravity is a much weaker force than the rest so maybe its influence is spread across multiple universes?

 

[Diane2]

jeeeeeeeeeeeeeeeeeeeeeeeeez, the original programme was bad enough.................6 pages in, and its getting worse....

thank god i sat with my earphones in reading the history of broadmoor!!

 

[sooey]

I'm into that subject but that last post of uri's bored the cr*pola out of me too.

Though I'd just like to inform him that the dark matter theory comes from the fact that the orbital speeds of stars in galaxies and galaxies in clusters would tear them apart if there wasn't some hidden extra mass to hold them together.