Timeline for answer to Conservation of angular momentum in a planetary system by image357
Current License: CC BY-SA 3.0
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| Apr 7, 2015 at 13:19 | comment | added | image357 | @ACuriousMind: the term $|\vec{r}_{\text{sun}} - \vec{r}_{\text{earth}} |$ of the gravitational potential is invariant und translation. but most idealization don't translate the sun's postion under a coordinate transformation, because it is assumed to be fixed. this idealization breaks the invariance. | |
| Apr 7, 2015 at 13:14 | comment | added | ACuriousMind♦ | It might be worth pointing that the central potential of a sun is rotationally, but not translationally invariant, hence angular momentum is conserved along an orbit in it, while linear momentum is not. (You are of course right about the global conversation, too) | |
| Apr 7, 2015 at 12:45 | history | answered | image357 | CC BY-SA 3.0 |