Re: The speed of light, etc
 

OMG why did i look at this thread, i now need to have a little lie down

Re: The speed of light, etc
 

One does not discount the other.
There seems plenty of evidence the big bang happened.
However, whatever went "bang" was already in existance.

Re: The speed of light, etc
 

and there within is the crux .

What ever was there before ( even if it is matter in an ever expanding contracting exploding universe) must always have been there which to our linear mortal brains is impossible

Re: The speed of light, etc
 

One i haven’t got my head around yet is how the Big Bang and Big Crunch theories work together, according to the second law of thermodynamics the total amount of entropy in an enclosed system (which the universe is) can only remain constant or increase never decrease.

So, if if entropy increases in a big bang Big Crunch scenario where does it come from ? & if entropy remains constant what happens to matter if it crosses the event horizon of a black hole ? It must come out? Hawkins radiation ?

Re: The speed of light, etc
 

Can someone explain how something infinite (the universe) can be expanding?

Re: The speed of light, etc
 

The universe in theory isn't infinite what is is expanding into is . Although even nothing is something and if it is nothing it goes on forever (maybe) re end scenes of Men in Black

Re: The speed of light, etc
 

So what is it expanding into and how would you know where the edge of the universe is and when you'd crossed over to the infinite expanse outside?

Re: The speed of light, etc
 

The universe can’t expand into something because it’s everything , there is no edge

https://www.newscientist.com/lastwor...xpanding-into/

Re: The speed of light, etc
 

I've worked that one out - at least to my satisfaction. There must be somewhere in space where no matter exists (yet). So I should be theoretically able to get there. What would I see? I believe you'd see everything you see now because the totality of the material universe bends light.

Re: The speed of light, etc
 

How do you know?

Re: The speed of light, etc
 

Let’s dissect this for fun

1. Somewhere in space where no matter exists would imply containment and the universe expanding into something
2. If you can’t travel faster than the speed of light and galaxies are being pushed apart faster than the speed of light how do you reach this area ?

Mind you it could be turtles all the way down for all we know….

Re: The speed of light, etc
 

Re: The speed of light, etc
 

Speed of light (in a vacuum) is a constant therefore relative to everything , however there is no reference frame that can be applied IIRC Newton & Einstein stated this (although I may have butchered it somewhat)

Point 2 those bloody turtles again

Re: The speed of light, etc
 

"The turtle* moves!"

*Great A’Tuin

Re: The speed of light, etc
 

Cosmic turtles and elephants....... just saying.