Timeline for Is this how stars’ right ascensions correlate to planets’ longitudes on a 2d map?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| Jun 3, 2021 at 17:53 | vote | accept | DavidBriz | ||
| Jun 2, 2021 at 21:38 | comment | added | Ng Ph | If it is a 2D representation, I don't understand why you are bothered with declination and latitude (your last bullet question)? My initial interpretation of your question is indeed that you want to approximately equate (correlate?) two angular measurements, (a) RA, defined in the Equatorial plane and (b) Celestial Longitude, defined in the Ecliptic plane. In essence, my interpretation of your question is: if I know by how much to turn in one plane, am I very far off if I turn in the other plane by the same angle? | |
| Jun 2, 2021 at 21:00 | history | tweeted | twitter.com/StackAstronomy/status/1400195522141564932 | ||
| Jun 2, 2021 at 19:49 | answer | added | Pierre Paquette | timeline score: 5 | |
| Jun 2, 2021 at 18:52 | comment | added | DavidBriz | @PM 2Ring thank you; so presumably that difference would only create discrepancies in latitude/declination. As my map is mostly 2D, that's acceptable. | |
| Jun 2, 2021 at 17:49 | comment | added | PM 2Ring | Traditionally, both systems were geocentric, but you can also have heliocentric versions of either system. The main difference is that the horizontal plane of the equatorial system is the celestial equator, but the horizontal plane of the ecliptic system is the ecliptic plane, i.e., the orbital plane of the Earth. | |
| Jun 2, 2021 at 17:09 | comment | added | DavidBriz | @PM thanks for the feedback; I believe the main difference is that equatorial coordinates are geocentric, but ecliptic are heliocentric. I hope that as our nearest stars are 260,000 – 500,000 AU away, using geocentric coordinates to find the direction from the Sun shouldn’t make much difference for a map only for my personal use (but obviously no good for navigation!). I’ve found this source of galactic coordinates (which I think have a different 0° point), but I haven’t found a source of ecliptic coordinates: icc.dur.ac.uk/~tt/Lectures/Galaxies/LocalGroup/Back/50lys.html | |
| Jun 2, 2021 at 16:41 | history | edited | DavidBriz | CC BY-SA 4.0 |
added eleanorlutz map
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| Jun 2, 2021 at 12:54 | comment | added | PM 2Ring | I suspect you have some confusion between ecliptic and equatorial coordinate systems. See en.wikipedia.org/wiki/Celestial_coordinate_system | |
| Jun 2, 2021 at 12:35 | comment | added | B--rian | Welcome to astronomy SE, and thank you for the nice question! | |
| Jun 2, 2021 at 11:35 | review | First posts | |||
| Jun 2, 2021 at 12:24 | |||||
| Jun 2, 2021 at 11:29 | history | asked | DavidBriz | CC BY-SA 4.0 |