The discussion revolves around the conceptual understanding of light travel time, the implications of observing distant objects in the universe, and the nature of the known universe. Participants seek clarification on how light allows us to see into the past and the significance of light's finite speed in this context.
Participants generally agree on the principle that light takes time to travel, but there is no consensus on the best way to conceptualize this idea or its implications for understanding the universe.
Some assumptions about the nature of light and spacetime may not be fully articulated, and the discussion does not resolve the complexities involved in conceptualizing light travel and its effects on observation.
What Borg said is pretty much all there is to it. Light travels at the speed c, so it can only move through the universe at that speed. Keep in mind that what we see is simply light reflected off objects and traveling through spacetime at speed c to us.Lewis123 said:I am having a large amount of trouble conceptualising the idea of light taking time to reach places, how we are seeing into the past when we look further out and the idea of the known universe.
If someone could please elaborate on those points it would be much appreciated.