miércoles, 16 de diciembre de 2015

TWO MOONS LINED UP PERFECTLY



NASA's Cassini spacecraft has haunted Saturn's neighborhood since it arrived there in 2004. It's a crowded place in space to be. Saturn has over 50 named moons and more than 60 satellites in all.

Two of those are Enceladus and Tethys, which recently aligned in Cassini's line of sight for a fascinating photo.

The dramatic image shows Saturn's rings stretching across the center of the picture with Enceladus sitting directly in front of Tethys, making what NASA describes as a "cosmic bull's eye."

The shot illustrates the relative sizes of the moons. Enceladus is 313 miles (504 kilometers) across while Tethys is over twice its size at 660 miles (1,062 kilometers) across. The image was taken on September 24 and released by NASA on Monday.