« Last post by Janus on Today at 16:34:53 »
Alternatively, you could just apply the counter-clockwise rule to the net rotation of the star system you are dealing with and then assign North to the bodies in that system accordingly, relative to the rotation plane of the system as a whole.That's what I initially thought, but Janus correct me.Wait, so in Venus, the sun rises in the west and sets in the east?Doesnt thesunrotate clockwise at the south pole and anti clockwise at the north ?
I looked it up and found this poor statement:QuoteThe International Astronomical Union (IAU) defines the geographic north pole of a planet or any of its satellites in the Solar System as the planetary pole that is in the same celestial hemisphere, relative to the invariable plane of the Solar System, as Earth's north pole.That essentially says that the orbital plane of Earth determines which pole is north. That works fine for our solar system, but I find it a poor definition because there is no Earth in other solar systems. A simple counter-clockwise rule like that would serve better for all objects anywhere.
I suppose one could extend Earth's orbital plane vector through the universe, allowing one to determine north so long as you know the orientation of the solar system from wherever you find yourself. This information may not be available.