1 Tymor
52 Pennod
The Mechanical Universe - Season 1 Episode 23
The precise orbit of a heavenly body — a planet, asteroid, or comet — is fixed by the laws of conservation of energy and angular momentum.
- Blwyddyn: 1985
- Gwlad:
- Genre: Documentary
- Stiwdio: PBS
- Allweddair:
- Cyfarwyddwr:
- Cast: