The discussion centers on the expansion speed of the universe 370,000 years after the Big Bang, clarifying that there is no singular "speed" at which points in space were moving apart. Instead, the Hubble parameter, which describes the expansion rate, is dependent on the distance between points. Participants emphasize that Hubble's law indicates recession speed is proportional to distance, making it impossible to define a universal recession velocity for that specific time.
PREREQUISITESAstronomers, cosmologists, and physics students interested in the early universe and the dynamics of cosmic expansion.
There is no such thing. The "speed" depends on how far apart the points are.sjordannc said:the speed at which points in space were moving apart from one another
The problem with this is that Hubble's law says that the recession speed is proportional to distance. So we can tell you the Hubble parameter back then, or we can tell you the recession speed of points a specific distance apart, but there is no single recession velocity. Not then and not now.sjordannc said:I'm looking for the speed at which points in space were moving apart from one another