Quote:
Originally Posted by Slawomir
Earth's atmosphere is nearly 500 km thick  ( even if most of it is within less than 20 km of the surface. ) |
Having spent the last 30 years operating airliners in the tropopause I’m fairly familiar with how density decreases with altitude
(interestingly, if a turbofan could still produce the same thrust at altitude as it does as sea level, there would be enough thrust there to get to orbit)
I digress, adding extra image abberation in by pointing an optical system vertically doesn’t change the system’s intrinsic resolution. It all still goes south from the starting datum.....