Post by naymissus on Sept 21, 2010 18:40:28 GMT
One hears so much nonsense about the velocity of light being the limit of velocity of any particle (but not phase velocity of course - we see phase velocities greater than the speed of light every day- well almost every day).
What nonsense!
Whole galaxies are moving faster than the speed of light!
How can I possibly say such things!?
Actually I am just parroting cosmologists that tell me this sort of thing
Here's the (cosmologists)reasoning:
The age of the Universe is about 14 billion years
That means of course that if a photon was emitted at the Big Bang, it would now be, travelling at c,about 14 billion light-years away
But, we are told, the diameter of the universe is about 93 billion light-years, that is outermost galaxies are some 46 billion light years away from the centre
In other words, they are travelling at about three times the speed of light!
No getting away from that folks!
You wil hear 'explanations' that the galaxies are not moving at that speed, but that the space in betweeen them is expanding at great speed
Fair enough - if you can understand such concepts but as speed = d/t irrespective of how 'distance' is calcuated then the speed of galaxies is ~3c!
QED
Repo
What nonsense!
Whole galaxies are moving faster than the speed of light!
How can I possibly say such things!?
Actually I am just parroting cosmologists that tell me this sort of thing
Here's the (cosmologists)reasoning:
The age of the Universe is about 14 billion years
That means of course that if a photon was emitted at the Big Bang, it would now be, travelling at c,about 14 billion light-years away
But, we are told, the diameter of the universe is about 93 billion light-years, that is outermost galaxies are some 46 billion light years away from the centre
In other words, they are travelling at about three times the speed of light!
No getting away from that folks!
You wil hear 'explanations' that the galaxies are not moving at that speed, but that the space in betweeen them is expanding at great speed
Fair enough - if you can understand such concepts but as speed = d/t irrespective of how 'distance' is calcuated then the speed of galaxies is ~3c!
QED
Repo