On Saturday 18 July 2020 16:52:34 Karl Jacobs wrote: > I meant to type "Hubble", of course. > NP, I just figured that was its local nick-name. Its about out of giro's again, I sure hope that now with Elon doing our launches again, they can figure our how to get to it for more service calls. Not to mention a few gallons of fuel to raise its orbit again. Even with its limited bandwidth its expanded our knowledge of the universe. The latest is going to be a set of pix of a blinking black hole that was just spotted a few months back. This universe is home to some STRANGE goings on.
> 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 > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
