... difficult to explain; it seems likely that both electrical and gravitational forces are at work. This voyage also helped to discovered that two of Saturn's small moons, one on each side of the F-ring, may act as "shepherds," their gravitational attraction keeping the ring particles on track between the orbits of the moons. The two prominent rings A and B and one faint ring C can be seen from Earth, rings D,F and ... . It was discovered by R. Terrile in 1980 and its name is also known as Hercules. It is the second moon from Saturn and is only 40 x 20 km in diameter. Calypso is the elevent...

• Word Count: 3775
• Approx Pages: 15
• Has Bibliography
• Grade Level: High School