Comment Re:If they can do this from earth... (Score 1) 165
Not entirely true. Even a significantly underexposed picture can be adjusted accurately to the right position by statistical measures. Do this for 100,000 for them, sum them up, and you've got a result.
In the extreme case that atmospheric noise completely shadows an object, though, the Hubble telescope can show off the real advantage of looking directly through free space: no dispersion of light in vacuum.
Even in a new moon, perfectly clear winter night somewhere deep in Canada, the light from the brighter stars creates a certain level of glowing within the atmosphere itself that suffices to hide many astral objects' light completely, as far as statistics go.
In the extreme case that atmospheric noise completely shadows an object, though, the Hubble telescope can show off the real advantage of looking directly through free space: no dispersion of light in vacuum.
Even in a new moon, perfectly clear winter night somewhere deep in Canada, the light from the brighter stars creates a certain level of glowing within the atmosphere itself that suffices to hide many astral objects' light completely, as far as statistics go.
