Re: Dark Energy does not add any extra "space" to Space in a galaxy.
Crux is totally in the Milky Way, I think,
No shit, every star you see is part of the Milky Way or a satellite galaxy unless it is a supernova. Go ahead, try to resolve individual stars in Andromeda or Triangulum from the Earth. You're gonna need a bigger telescope.
The problem with knowing everything is learning nothing.
If you don't know what you're doing, find someone who does, and do what they do.