yes, the standard takes the center of the sun as fixed (or, technically, the barycenter of the Solar system, i.e. the center of mass of the whole shebang...which is basically the same, but not precisely) https://en.wikipedia.org/wiki/Celestial_coordinate_system …
what I'm curious about / don't yet know, is what is used to define the meridian of the solar coordinate system? Like, N/S is pretty obvious (either sun's N/S axis, or Earth's ecliptic plane, or something), but what's the Grenwhich observatory to locate 0° ?
-
-
3/ ah > the primary direction (0° ecliptic longitude) points from the Earth towards the Sun at the vernal equinox of the Northern Hemisphere. https://en.wikipedia.org/wiki/Ecliptic_coordinate_system#Spherical_coordinates … ...so in 2 more days Earth will be sweeping through 0° solar ...oh, wait, no EQUINOX not SOLSTICE
-
4/ so I guess we're at about -92° right now?
End of conversation
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.