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Saturn's rings, five moons shine in spectacular photo

A stunning new photo from thee  Cassini spacecraft shows five moons of Saturn hovering around two of the gas giant planet's dazzling rings.
Image: Saturn's A and F rings and five of its moons
This photo, taken by NASA's Cassini spacecraft on July 29, 2011, shows Saturn's A and F rings and five of its moons. From left, the moons are Janus, Pandora, Enceladus, Mimas and RheaNASA/JPL-Caltech/Space Science Institute
/ Source: Space.com

A stunning new photo from NASA's Cassini spacecraft shows five moons of Saturn hovering around two of the gas giant planet's dazzling rings.

The image, which NASA released Wednesday, shows Saturn's moons Janus, Pandora, Enceladus, Mimas and Rhea. The planet's rings are beyond Rhea and Mimas, while bright Enceladus appears behind the rings. Cassini took the picture in visible green light on July 29, 2011. [ See the amazing photo of Saturn's rings and moons ]

The view looks toward the northern, sunlit side of the rings from just above the ringplane, researchers explained in a description.

The five Saturn moons in Cassini's photo vary greatly in size, with Pandora (50 miles wide) and Janus (111 miles) the smallest. The "Death Star moon" Mimas measures 246 miles across and Enceladus is 313 miles wide. Rhea is Saturn's second-largest moon, at 949 miles across.

In the image, Pandora appears near the center of the frame between Saturn's A ring and the thin F ring.

Cosmic Log: Taste a raw slice from a Saturn moon

The Cassini spacecraft was closest to Rhea when it snapped the photo — about 684,000 miles, researchers said. The spacecraft was 1.1 million miles from Enceladus, a frozen world that spouts water-ice geysers into space.

Saturn has more than 60 known moons. The largest, Titan, is about 3,200 miles wide, making it nearly 50 percent bigger than Earth's moon. [ Photos: The Rings and Moons of Saturn ]

NASA launched Cassini toward Saturn in 1997, and the spacecraft arrived at the ringed planet in 2004. Cassini has been circling the planet to study its rings and moons ever since. Cassini also carried the European Huygens lander, which touched down on Titan in 2005. 

Cassini's mission was originally slated to end in 2008, but NASA has extended the Saturn flight twice, most recently until 2017. The Cassini mission is a cooperative effort by NASA, the European Space Agency and the Italian space agency.

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