3 ms·
Spin a coin on top of a glass table. Observe it from the top, and it spins either clockwise or anticlockwise. Observe it from the bottom and it's the opposite.
by 1970-01-01 2y ago
Spin a coin on top of a glass table. Observe it from the top, and it spins either clockwise or anticlockwise. Observe it from the bottom and it's the opposite. There are no tables in space. Objects tumble while rotating. It seems we are measuring rotations using a fixed perspective when there is no reason to do so
https://www.comsol.com/blogs/why-do-tennis-rackets-tumble-the-dzhanibekov-effect-explained https://www.comsol.com/blogs/why-do-tennis-rackets-tumble-th...
- richwater 2y agoThe paper measures rotation relative to the Milky Way galaxy.
- hnuser123456 2y agoIf there were 10 pennies and 7 of them were spinning the same direction, you might say one direction appears to be favored. Spiral galaxies spin, they do not tumble unless hit by another galaxy. Elliptical galaxies are like gravitational convection and don't really have cohesive "rotation", however.