> > If they can coat them in a way to not be reflective > Less reflective. I don't think there's a way to make them not reflective, and many, many astronomical

> > If they can coat them in a way to not be reflective > Less reflective. I don't think there's a way to make them not reflective, and many, many astronomical objects are very dim. Vantablack[0] would probably be adequate for the timescales involved, at least for most terrestrial[1] observations: [0] https://www.sciencealert.com/this-object-has-been-sprayed-with-the-world-s-blackest-pigment-and-it-s-freaking-us-out https://www.sciencealert.com/this-object-has-been-sprayed-wi... [1] eg. I can easily imagine a similar but more severe problem for a lunar farside observatory if (when?) Starlink is expanded to provide internet coverage for the Moon's surface. Of course, the main reason for a farside observatory would be shielding from Earth's RF emissions, so just people needing and wanting internet access on farside is probably going to be a problem first.