Bjarne
Philosopher
- Joined
- Oct 6, 2009
- Messages
- 5,087
Bjarne - you're making understandable (in some of these cases) but very common and very basic errors. I think you need to find a good basic text on cosmology.
Have a look at http://blogs.discovermagazine.com/cosmicvariance/2008/10/06/does-space-expand/ again - it's pretty clear why it's ok for those galaxies to be moving 'faster than light'. At no time does any galaxy overtake any ray of light - so how can they be moving faster than light? Just because a certain distance increases at a rate faster than light travels doesn't mean the laws of physics are being broken.
Lots of things in cosmology - in particular many things that RC and others are describing - are counterintuitive. This does not mean they defy logic or physics, only that they take some thought to get to grips with.
If the universe is bigger than the visible 13,7 billion LY, - and hubbles law must be understood as MOTION, then galaxies relative to us MUST move faster as c. Which of course is insane nonsense.

:
)
!
) and you beam a laser first forwards (beam A) and then backwards (beam B), How fast will: