This is just the Milky Way not the entire Galaxy. There are possibly hundreds of billions of earth like planets if not trillions out there in the Galaxy.
They are just so far away we could never realistically communicate with them let alone ever reach them.
oh we can get there
Warp Drive More Possible Than Thought, Scientists Say | Space
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www.space.com/17628-warp-drive-possible-interstellar-spaceflight.htmlhttps://www.space.com/17628-warp-drive-possible-interstellar-spaceflight.html
A ring-shaped warp drive device could transport a football-shape starship (center) to effective speeds faster than light. The concept was first proposed by Mexican physicist Miguel Alcubierre.
This is just the Milky Way not the entire Galaxy.
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The Milky Way is a Galaxy, in and of itself. We and our solar system are a very small portion of it.