« on: 07/12/2023 23:49:15 »
Maybe it's just meNot just you.
Why do artificial satellites of the Earth rotate by inertia longer than artificial satellites of the Moon?I think a citation is needed. Conservation of angular momentum says that any rotating object will continue rotating unless an external torque is applied to it. I have never heard of any artificial satellites ever being anywhere long enough for enough external torque to be applied to halt its rotation. Slow a tiny bit perhaps, but tidal forces are the only force I can think of that would do this, and they're just not strong enough when acting on something as small as any artificial satellite we've put up anywhere, regardless of which object it happens to orbit.
The Hubble telescope is an interesting example. Its angular momentum is very near zero, and it needs to halt its rotation for hours/weeks at a time, but then it will rotate to a new orientation using gyros, all of which work without ever altering the total angular momentum of the satellite.
Also, please stop posting any topics in Question of the Week. The sub-forum is reserved for topics by radio listeners and is not for new posts by any forum members. I have been known to just delete invalid topics from there rather than move them.