Janus and Epimetheus
Jan. 21st, 2006 09:57 am![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
mmcirvinYesterday was the day that Saturn's small irregular moons Janus and Epimetheus approached most closely as they swap orbits (the page explains the physics and has some nice animations).
mmcirvinmmcirvin