The discussion revolves around the concept of expansion in the context of the Big Bang theory, specifically questioning whether this expansion includes all objects in the universe, such as galaxies and planets, or if it is limited to larger structures like galaxy clusters.
Participants do not reach a consensus, as there are competing views regarding the nature of expansion and what it encompasses within the universe.
There are references to numerous existing threads on the forum that may provide additional context or perspectives on the topic, suggesting a rich background of discussion that is not fully explored in this thread.
It doesn't mean either one. Galaxies do not expand, nor do the planets. Only constructs larger than galactic clusters "expand" and by "expand" it just means they get farther apart. There are HUNDREDS (probably thousands) of threads on this there on PF. I suggest a forum search.Vivek Siddarth K said:We all know BigBang theory, which states that the universe is continuously expanding, my doubt is the term expanding, does it mean the expansion of galaxies as a whole or including the planets in it?.
Thanks for the link... very interesting...phinds said:It doesn't mean either one. Galaxies do not expand, nor do the planets. Only constructs larger than galactic clusters "expand" and by "expand" it just means they get farther apart. There are HUNDREDS (probably thousands) of threads on this there on PF. I suggest a forum search.