Enceladus_Tethys_bullseyEnceladus and Tethys line up almost perfectly in this shot from the Cassini spacecraft. Since the two moons are not only aligned, but also at nearly the same distance from Cassini, their apparent sizes are a reasonable approximation of their relative sizes. Enceladus is 504 km across, and Tethys is 1,062 km in diameter.

Image Credit: NASA

1 thought on “Bullseye

  1. I am constantly amazed by this part of NASA. This spacecraft was launched in 1997 and is somehow capable of getting these images back to us almost 20 years later.

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