"<a href=""https://www.youtube.com/watch?v=KW8Vjs84Fxg&amp;t=1h34m49s"">1:34:49</a> "...the more cool space cities we have in orbit", the more shiny objects in the night sky, the worse it is for astronomers..." ??? When we have cool space cities in orbit, we will also have cool space telescopes in orbit -- probably thousands of them. At that point, why would any astronomer want to use an Earth based telescope?