Why Can't the Hubble Space Telescope See Astronauts on the Moon?
Briefly

The common argument that Hubble can see distant galaxies but not Apollo footprints demonstrates a misunderstanding of how telescopes operate, primarily differentiating magnification from resolution.
Telescopes primarily increase resolution, which is the ability to distinguish closely spaced objects, rather than just magnifying images, which does not solve the problem of distance.
Read at www.scientificamerican.com
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