Re:Sidereal time (365 days on Earth is 366 rotations when vi...
by JoeAltmaier on Thursday November 30, 2023 @03:24PM
(#38478574)
Heck, when viewed from the ground too.
If you count rotations relative to say the north star, then you get 366 from your backyard over the year. Presuming you're in the Northern Hemisphere and can see it (88% of us).
Rotation relative say to the sun, noon to noon, is about one degree more than one absolute rotation. Because of course, the earth is hurling around the sun too, so to get back to noon it has to 'catch up' with that motion by going just that little bit further. So in 365 days, about one more rotation.
If you count rotations relative to say the north star, then you get 366 from your backyard over the year. Presuming you're in the Northern Hemisphere and can see it (88% of us).
Rotation relative say to the sun, noon to noon, is about one degree more than one absolute rotation. Because of course, the earth is hurling around the sun too, so to get back to noon it has to 'catch up' with that motion by going just that little bit further. So in 365 days, about one more rotation.