SWaB: Why the Moon’s two faces are so different
- notFritzArgelander
- In Memory
- Articles: 0
- Posts: 14925
- Joined: Fri May 10, 2019 4:13 pm
- 4
- Location: Idaho US
- Status:
Offline
-
TSS Awards Badges
SWaB: Why the Moon’s two faces are so different
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
- Chich
- Pluto Ambassador
- Articles: 0
- Posts: 483
- Joined: Fri Jul 05, 2019 6:40 am
- 4
- Location: Vancouver Island, BC
- Status:
Offline
-
TSS Awards Badges
Re: SWaB: Why the Moon’s two faces are so different
Thanks. That was an interesting read
Keep calm and set SCE To AUX
Wildland fire: a strong tradition since 440,000,000 BCE
NEW for 345,000,000 BCE - Crown fires!
- seigell
- Jupiter Ambassador
- Articles: 0
- Posts: 274
- Joined: Mon May 13, 2019 4:59 pm
- 4
- Location: Florida, USA
- Status:
Online
Re: SWaB: Why the Moon’s two faces are so different
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...)
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
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...)
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...)
- notFritzArgelander
- In Memory
- Articles: 0
- Posts: 14925
- Joined: Fri May 10, 2019 4:13 pm
- 4
- Location: Idaho US
- Status:
Offline
-
TSS Awards Badges
Re: SWaB: Why the Moon’s two faces are so different
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.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...)
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
- seigell
- Jupiter Ambassador
- Articles: 0
- Posts: 274
- Joined: Mon May 13, 2019 4:59 pm
- 4
- Location: Florida, USA
- Status:
Online
Re: SWaB: Why the Moon’s two faces are so different
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...)
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...)
Create an account or sign in to join the discussion
You need to be a member in order to post a reply
Create an account
Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute