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Thread: spindle galaxies

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    Default spindle galaxies



    Past items italicized. Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7, Orion and SW 80 and 120 ED, Orion ED80T, Orion 120 f8.3, Tasco 30x30, Edmund 40; Newtonians: AT 8”f4, OC 8”f6.3, Z12 f5, self made 6” f9, Orion 10" f4.7, Orion XX14i; Catadioptrics: VMC110L, Intes MK66, Orion 102 MakCas f12.7, Celestron 9.25 SCT and 9.25 Edge. EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, TV Nagler, ES100s, Edmund Orthoscopics, Baader Hyperions. Mounts: Orion Sirius EQG, Star Seeker III, Celestron CG5, Vixen Porta II, Orion Atlas, Losmandy G11

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    Default Re: spindle galaxies

    Thanks for posting this. I shall eagerly await the Chilean MUSEings on it.
    Scopes: 28" f/3.8 self built Dob, 8" Skywatcher f/4 Newt, iOptron 115mm f/8 Newt, Nova 9.5" RC, Celestron 5" f/6 FAST SCT, 6" f/15 Jaegers achro, Celestron Nexstar 102mm achro.
    EP's: WO 40mm SWAN, 20, 9mm, 3.5mm XWA; ES 14mm 100°; Meade 5mm MWA; Gary Russell Konigs and zoom, TMB 2.5mm, 3.2mm, 4mm Planetaries; TV 1.8x 2.5x Barlows; Some older Plossls and Orthos
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    Binos: Bushnell 80x20 Astralis, Celestron 70x15 Skymaster, Hanimex 50x12, Pentax 50x10, Several 50x7

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    Default Re: spindle galaxies

    It's an interesting instrument. It provides complete spectra throughout the visual frequencies.

    https://en.wikipedia.org/wiki/Multi_...copic_Explorer

    The resolution is high enough to provide radial velocity measures for all the stars at typical galaxy rotation speeds. Nice!
    Past items italicized. Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7, Orion and SW 80 and 120 ED, Orion ED80T, Orion 120 f8.3, Tasco 30x30, Edmund 40; Newtonians: AT 8”f4, OC 8”f6.3, Z12 f5, self made 6” f9, Orion 10" f4.7, Orion XX14i; Catadioptrics: VMC110L, Intes MK66, Orion 102 MakCas f12.7, Celestron 9.25 SCT and 9.25 Edge. EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, TV Nagler, ES100s, Edmund Orthoscopics, Baader Hyperions. Mounts: Orion Sirius EQG, Star Seeker III, Celestron CG5, Vixen Porta II, Orion Atlas, Losmandy G11

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    Default Re: spindle galaxies

    Quote Originally Posted by not_Fritz_Argelander View Post
    It's an interesting instrument. It provides complete spectra throughout the visual frequencies.

    https://en.wikipedia.org/wiki/Multi_...copic_Explorer

    The resolution is high enough to provide radial velocity measures for all the stars at typical galaxy rotation speeds. Nice!
    What amazes me is some of the measurements that were able to make long ago, like back in the 30's to find evidence for dark matter. It's hard to imagine they were able to make such precise measurements back then to not only gauge galaxies were in motion, but how they were moving. I'm sure they had to use something more than just a set of calipers to measure those changes over such a short period of time (on a universal scale, anyway). What would they have accomplished then with the tools we have today. What will they find tomorrow?

    I love reading this stuff. I don't always understand it all, and I'm sure I'll never be a cosmologist, but I enjoy learning of it.
    Telescopes: 10" SkyLine Dobsonian, Celestron Nextar GT90, Meade Infinity 80
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    20mm, 26mm, 32mm, 40mm Meade 4000 Plossls, 30mm, 20mm, 15mm GSO Superview, Orion Expanse, Various others.
    Binocs: 15x70 Celestron Skymaster, 10x50 Levenhuk Karma Pro, 10x42 Bushnell, 8x42 Sans & Streiffe

    "Bleh." --Don Alvarez

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    Default Re: spindle galaxies

    Zwicky's original measurements were radial velocity measurements and he applied a result called the Virial Theorem that relates the total kinetic and gravitational potential energies. So higher dispersion of radial velocities implies a larger mass, just as a higher mass star in equilibrium must have a higher internal temperature. What I find remarkable is that his result has been so robust. It has held up very well and even through huge revisions of the cosmic distance scale.
    Past items italicized. Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7, Orion and SW 80 and 120 ED, Orion ED80T, Orion 120 f8.3, Tasco 30x30, Edmund 40; Newtonians: AT 8”f4, OC 8”f6.3, Z12 f5, self made 6” f9, Orion 10" f4.7, Orion XX14i; Catadioptrics: VMC110L, Intes MK66, Orion 102 MakCas f12.7, Celestron 9.25 SCT and 9.25 Edge. EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, TV Nagler, ES100s, Edmund Orthoscopics, Baader Hyperions. Mounts: Orion Sirius EQG, Star Seeker III, Celestron CG5, Vixen Porta II, Orion Atlas, Losmandy G11

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