4 ms·
It follows from conservation of angular momentum :) If the axis direction changed (for a fixed orbit), then Earth's (or Solar system's, etc.) angular momentum w
by gnramires 2y ago
It follows from conservation of angular momentum :) If the axis direction changed (for a fixed orbit), then Earth's (or Solar system's, etc.) angular momentum would be changed, not be conserved.
- dumbo-octopus 2y agoUnless the Sun's tilt moved ever so slightly in compensation. Around one one billionth of a degree to be exact. Impossible to detect.
- gnramires 2y agoIndeed. Another fact you can use is that in Newtonian mechanics (although not in GR due to frame dragging, only approximately), a rotating spherical body has the same gravitational field as a static one. So there would be no mechanism for the axially tilted rotating Earth to influence the Sun (different from a non-rotating Earth).