What is 890 billion times more massive than Sol?
- Kanadalainen
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What is 890 billion times more massive than Sol?
And I don't mean the bloke down at the corner pub.
https://phys.org/news/2019-12-mass-milk ... n-sun.html
https://phys.org/news/2019-12-mass-milk ... n-sun.html
Ian
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Fracs: Stellarvue 70T f6; SW 120mm Esprit f7; "Mark Mk. II" - 60 mm Tasco f6; C80 frac f 11.4
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Dob: 14.5" homebuilt strut dob (f4.5 ZOC mirror), Nexus II, Moonlite focuser
Mounts - Ioptron Skyguider pro, Astro Physics GTO900
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- ThinkerX
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Re: What is 890 billion times more massive than Sol?
given that the vast majority of stars are red dwarfs with but a fraction of the suns mass, this argues for at least 2 trillion stars (and that estimate is on the low side)
- helicon
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Re: What is 890 billion times more massive than Sol?
Holy Cow!
-Michael
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- ThinkerX
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Re: What is 890 billion times more massive than Sol?
on second thought, I must wonder if the 890 billion figure cited in the OP includes Dark Matter. If so, that would dramatically reduce the number of stars, though they'd still number well into the hundreds of billions
- notFritzArgelander
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Re: What is 890 billion times more massive than Sol?
My understanding is that 5/6 of this is dark matter, roughly.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: What is 890 billion times more massive than Sol?
Yes. From that article:
"The researchers still had to take into account dark matter, which prior research has suggested makes up approximately 93 percent of the galaxy's total mass. Putting both into their calculations led to the total mass of the galaxy and a calculation for the total mass of just the dark matter—830 billion times that of the sun."
"The researchers still had to take into account dark matter, which prior research has suggested makes up approximately 93 percent of the galaxy's total mass. Putting both into their calculations led to the total mass of the galaxy and a calculation for the total mass of just the dark matter—830 billion times that of the sun."
Ian
Fracs: Stellarvue 70T f6; SW 120mm Esprit f7; "Mark Mk. II" - 60 mm Tasco f6; C80 frac f 11.4
SCT: C8 Edge f10 or f7 with reducer
Dob: 14.5" homebuilt strut dob (f4.5 ZOC mirror), Nexus II, Moonlite focuser
Mounts - Ioptron Skyguider pro, Astro Physics GTO900
Cameras and lenses - ZWO 2600 mc, 290 mm mini, Canon 60D modded with Rokinon 10mm 2.8; Rokinon 135mm f2
Skysafari 6 Pro, Astro Pixel Processor, Pixinsight - using Mac tablet and ASIair pro to run the AP rig.
"Mothers! It is there!" - Rafael Gonzales-Acuna, 2018.
Fracs: Stellarvue 70T f6; SW 120mm Esprit f7; "Mark Mk. II" - 60 mm Tasco f6; C80 frac f 11.4
SCT: C8 Edge f10 or f7 with reducer
Dob: 14.5" homebuilt strut dob (f4.5 ZOC mirror), Nexus II, Moonlite focuser
Mounts - Ioptron Skyguider pro, Astro Physics GTO900
Cameras and lenses - ZWO 2600 mc, 290 mm mini, Canon 60D modded with Rokinon 10mm 2.8; Rokinon 135mm f2
Skysafari 6 Pro, Astro Pixel Processor, Pixinsight - using Mac tablet and ASIair pro to run the AP rig.
"Mothers! It is there!" - Rafael Gonzales-Acuna, 2018.
- GCoyote
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Re: What is 890 billion times more massive than Sol?
So it's a fashion choice. Dark matter makes a galaxy look less massive than it really is.
Any metaphor will tear if stretched over too much reality.
Gary C
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Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
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Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
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(And a bunch of stuff I'm still trying to fix or find parts for.)
- notFritzArgelander
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Re: What is 890 billion times more massive than Sol?
Love it. DM is a very slimming "little black dress"! Maybe I should try one on?
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
- pakarinen
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Re: What is 890 billion times more massive than Sol?
notFritzArgelander wrote: ↑Sat Dec 14, 2019 9:38 pm Love it. DM is a very slimming "little black dress"! Maybe I should try one on?
If you do, please do not post photos.
=============================================================================
I drink tea, I read books, I look at stars when I'm not cursing clouds. It's what I do.
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AT50, AT72EDII, ST80, ST102; Scopetech Zero, AZ-GTi, AZ Pronto; Innorel RT90C, Oberwerk 5000; Orion Giantview 15x70s, Vortex 8x42s, Navy surplus 7x50s, Nikon 10x50s
I drink tea, I read books, I look at stars when I'm not cursing clouds. It's what I do.
=============================================================================
AT50, AT72EDII, ST80, ST102; Scopetech Zero, AZ-GTi, AZ Pronto; Innorel RT90C, Oberwerk 5000; Orion Giantview 15x70s, Vortex 8x42s, Navy surplus 7x50s, Nikon 10x50s
- notFritzArgelander
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Re: What is 890 billion times more massive than Sol?
I don't think that posting photos was ever in the cards....pakarinen wrote: ↑Sat Dec 14, 2019 10:09 pmnotFritzArgelander wrote: ↑Sat Dec 14, 2019 9:38 pm Love it. DM is a very slimming "little black dress"! Maybe I should try one on?
If you do, please do not post photos.
You are giving me ideas of things to try with my avatar for the holidays, though.....
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
- ThinkerX
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Re: What is 890 billion times more massive than Sol?
which puts the 'ordinary matter' component at 60 billion solar masses. With low mass M class dwarfs accounting for 70% or more of all stars...toss in a few of these gargantuan black holes...150-200 billion stars, roughly on a par with prior estimates..."The researchers still had to take into account dark matter, which prior research has suggested makes up approximately 93 percent of the galaxy's total mass. Putting both into their calculations led to the total mass of the galaxy and a calculation for the total mass of just the dark matter—830 billion times that of the sun."
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