SWaB: Why the Moon’s two faces are so different

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notFritzArgelander
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SWaB: Why the Moon’s two faces are so different

#1

Post by notFritzArgelander »


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: SWaB: Why the Moon’s two faces are so different

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Post by Chich »


Thanks. That was an interesting read
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Re: SWaB: Why the Moon’s two faces are so different

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Post by seigell »


OK, so a Hot Early Earth...
1) Any proposal for Why that would be?? Other than "because it allows this proposal to work"?? Is Earth somehow "special", or were all 4 (got to include Theia and which ever ones were ejected by Jupiter) including Venus and Mars similarly "hot"?? Neither shows signs of Plate Tectonics (a strong indicator of remaining internal heat).
2) How did Earth and Theia collide with such catastrophic force if both objects occupied similar Orbits?? Orbital Math states that objects in orbits of similar radii are going to have very similar Orbital Velocities. (yes, a nitpick...)
ES AR152 / ES 80ED Apo / Orion 8in F/3.9 / C9.25-SCT / C6-SCT / C10-NGT / AT6RC / ST-80 / AstroView 90 / Meade 6000 APO 115mm
CGEM (w HyperTune and ADM bling) / 2x CG5-AGT / Forest of Tripod legs / Star Adventurer / Orion EQ-G
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Re: SWaB: Why the Moon’s two faces are so different

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Post by notFritzArgelander »


seigell wrote: Mon Oct 03, 2022 2:42 am OK, so a Hot Early Earth...
1) Any proposal for Why that would be?? Other than "because it allows this proposal to work"?? Is Earth somehow "special", or were all 4 (got to include Theia and which ever ones were ejected by Jupiter) including Venus and Mars similarly "hot"?? Neither shows signs of Plate Tectonics (a strong indicator of remaining internal heat).
2) How did Earth and Theia collide with such catastrophic force if both objects occupied similar Orbits?? Orbital Math states that objects in orbits of similar radii are going to have very similar Orbital Velocities. (yes, a nitpick...)
In the context of our understanding of early solar system formation all the planets would have been hot due to the heat of formation. At that time all would have been quite hot because of the process of accreting planetesimals. Hot as in molten lava surfaces.

The absence of plate tectonics now is not evidence that the planets were not hot then.

There’s no evidence to suggest that any planets were ejected from Jupiter. Velikovsky’s suggestion so, is discredited as pseudoscience.

A small difference in velocity is all that is needed. The gravitational potential energy released is quite enough to make it work.
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: SWaB: Why the Moon’s two faces are so different

#5

Post by seigell »


It seems that "Moon's Origins as Theia Impact" is the current media rage - here's NASA's video contribution: New Supercomputer Simulation Sheds Light on Moon's Origin
ES AR152 / ES 80ED Apo / Orion 8in F/3.9 / C9.25-SCT / C6-SCT / C10-NGT / AT6RC / ST-80 / AstroView 90 / Meade 6000 APO 115mm
CGEM (w HyperTune and ADM bling) / 2x CG5-AGT / Forest of Tripod legs / Star Adventurer / Orion EQ-G
550D (Modded-G.Honis) / 60D / 400D / NexImage / NexGuide / Mini 50 SSAG / ST-8300C / ASI120MM-S / ASI1600MM-Cool
Dark Skies in SW CO when I can get there, and badly light polluted backyard when I can't... (Currently Self-Exiled to Muggy Central Florida...)
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