Timeline for Determination of High-Accuracy Distances of Terrestrial Planets from the Sun
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Jun 17, 2020 at 9:47 | history | edited | CommunityBot |
Commonmark migration
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| Jul 25, 2018 at 18:00 | vote | accept | steveOw | ||
| Jul 20, 2018 at 21:08 | answer | added | astrosnapper | timeline score: 2 | |
| Jan 6, 2018 at 17:34 | comment | added | steveOw | @barrycarter. Hmmm, I'm speaking from ignorance but: (1) what is the method of obtaining the Earth:Sun-Centre displacement vector? (2) what is the magnitude of e1?, I guess it is much poorer than e2. (3) Assuming the Earth:Sun and Earth:Planet observations are not synchronous there will be a need for precise determinations of intervening observer- and target-displacements - how are they obtained? and with what additional assumptions/dependencies/corrections/ /uncertainties? | |
| Jan 6, 2018 at 12:17 | comment | added | user21 | I might be missing something, but if we accurately know the Earth-Sun vector with accuracy e1 and the Earth-given_planet vector with accuracy e2, we know the Sun-given_planet vector with accuracy better than e1+e2 by the triangle inequality. | |
| Jan 5, 2018 at 18:49 | history | tweeted | twitter.com/StackAstronomy/status/949352046335090688 | ||
| Jan 5, 2018 at 17:20 | comment | added | steveOw | @AtmosphericPrisonEscape Thankx for your feedback. It has prompted me to add some Aftrthoughts to my question. :) | |
| Jan 5, 2018 at 17:18 | history | edited | steveOw | CC BY-SA 3.0 |
Added Afterthoughts section.
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| Jan 5, 2018 at 16:52 | history | edited | steveOw | CC BY-SA 3.0 |
Added Afterthoughts section.
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| Jan 5, 2018 at 14:16 | comment | added | AtmosphericPrisonEscape | We do live in the age where communication with light-speed is possible. Also we have satellites. Simultaneous observations of two objects on two different hemispheres is not a problem. Knowing this, I wouldn't think your issue to be a big problem, although I don't claim to know how your question can be answered. | |
| Jan 5, 2018 at 14:03 | comment | added | steveOw | @AtmosphericPrisonEscape. Yes I have thought about it and but I don't know what the levels of accuracy/error are for angular measurements and timing synchronization between measurements of different things (distance, angle) at different epochs. Also I'd guess there's some dependence on initial assumptions about observer position. Also afaik none of the raw triangulation data include direct measures of the position of the Solar centre. | |
| Jan 5, 2018 at 11:39 | comment | added | AtmosphericPrisonEscape | "But I am not clear about how highly-accurate distances can be determined between those planets and the centre of the Sun. " Did you think about triangulation? | |
| Jan 5, 2018 at 1:42 | history | edited | steveOw | CC BY-SA 3.0 |
Added Newtonian equation and other minor edits.
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| Jan 5, 2018 at 1:25 | history | asked | steveOw | CC BY-SA 3.0 |