Janus (moon)
Janus is a moon of Saturn. It was discovered by Audouin Dollfus in 1966. Astronomers were first mistaken that another moon, Epimetheus, was the same as Janus. Voyager 1 confirmed in 1980 that there were two moons that share the same orbit.
Janus (moon) Media
- PIA08170 Epimetheus and Janus.jpg
Epimetheus (lower left) and Janus (right) seen on 20 March 2006, two months after swapping orbits. The two moons appear close only because of foreshortening; in reality, Janus is about 40,000 km farther from Cassini than Epimetheus.
- Epimetheus-Janus Orbit.png
Rotating-frame depiction of the horseshoe orbits of Janus and Epimetheus
Animation of Epimetheus's orbit – Rotating reference frame Saturn · Janus · Epimetheus
- Janus - Voyager 2.jpg
Janus as viewed by Voyager 2 (1981-08-25).
- Saturn's moons Janus and Prometheus PIA08192 (NASA).jpg
Janus and Prometheus lie above and below Saturn's rings (2006-04-29).
- PIA18353-SaturnRingsMoons-JanusTethys-20151027.jpg
Janus and Tethys (foreground) near Saturn's rings (2015-10-27).
Janus as imaged by Cassini (2008-02-20).
- PIA10447 Janus.jpg
Crescent Janus (2008-06-30).
