Universe expanding +c. +c impossible?

AI Thread Summary
The discussion centers on the concept of the universe's expansion and its relationship with the speed of light (C). It clarifies that while transmitting information or objects faster than C is prohibited, the expansion of space itself can occur at rates exceeding C. This means that galaxies can move away from each other faster than light due to the increasing distances in the expanding universe. The analogy of a balloon illustrates this phenomenon, where points on the surface represent galaxies moving apart as the balloon inflates. Ultimately, the expansion of the universe allows for distances to increase without violating the laws of physics regarding the speed of information transfer.
budd
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can anybody explain this to joe public?
 
Space news on Phys.org
Transmitting information (or moving a physical object - same thing) from place to place faster than C is banned. Moving the two places apart faster than C is allowed
 
or, to think of it in a mind warping way (no pun intended)... When the universe expands, it's not that things are flying apart from each other, it's that the distances between everything are getting bigger.
 
so on this balloon thingy. if we start of with 2 galastic clusters next to each other but movin g away at +c how do we see them?
 

Thread 'Questions about quantum cosmology'

what is the current status of the field for quantum cosmology, are there any observations that support any theory of quantum cosmology? is it just cosmology during the Planck era or does it extend past the Planck era. what are the leading candidates into research into quantum cosmology and which physics departments research it? how much respect does loop quantum cosmology has compared to string cosmology with actual cosmologists?
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