I meant to type "Hubble", of course. Am 18.07.2020 um 22:47 schrieb Karl Jacobs: > Hi Gene, > > 0.01 arcsec is way too high resolution. Unless you have a telescope > with 12.6m diameter (sin(delta) = 1.22 * lambda/D, with delta the angle > in radians, lambda the light wavelength (take green 500nm) and D the > diameter.) Even then, in extremely good skies from ground level, our > atmosphere might only allow an arcsec of seeing (scintillation or > twinkling of the stars). This is why you guys over the pond launched > Hubbly into orbit. And ground based astronomers use adaptive optics > these days. > And yes, I am an astrophysicist using LinuxCNC for fun. > Cheers and clear skies, > Karl > > Am 18.07.2020 um 19:01 schrieb Gene Heskett: >> But for astrophotography, they are mentioning .01 arc-seconds or better, > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users >
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