The Trailing Trojan

In a bit of more flyby goodness here’s a photo of Calypso, taken in ultraviolet light, showing nice shading on its surface and some interesting streak patterns that seem to follow the contours of the potato-shaped moon. This image was taken on Saturday, February 13, at a distance of about 14,000 miles. 19-mile-long Calypso is…

Hail, Calypso

A lesser-known moon, Calypso orbits Saturn in the same path as Tethys and another miniature moon called Telesto. Known as the “Tethys Trojans”, these two oblong-shaped moons were discovered in 1980 by Earth-based telescopes and eventually photographed by Cassini. The moniker “trojan” in astronomy is reserved for satellites that orbit a planet in the same…