If you look very, very carefully at this majestic photo of Saturn, you can see a number of familiar astronomical bodies and features, including several Saturnian moons, Mars, Venus, and even Earth. You'll find a fully annotated version of the photo below.

The photo was taken by the Cassini spacecraft last July as part of The Day the Earth Smiled Project.


Click to embiggen (NASA/JPL/Caltech):


If you still can't make them out, the objects listed are (from left to right): Enceladus, Prometheus, Epimetheus, Ring spokes, Mars (way up at top), Tethys (way down at bottom), Ring clumps, Venus, Janus' ring, Janus, Pallenene's ring, Earth-Moon (at bottom right), Mimas, and Pandora.

NASA explains how the photo was taken:

With the sun's powerful and potentially damaging rays eclipsed by Saturn itself, Cassini's onboard cameras were able to take advantage of this unique viewing geometry. They acquired a panoramic mosaic of the Saturn system that allows scientists to see details in the rings and throughout the system as they are backlit by the sun. This mosaic is special as it marks the third time our home planet was imaged from the outer solar system; the second time it was imaged by Cassini from Saturn's orbit; and the first time ever that inhabitants of Earth were made aware in advance that their photo would be taken from such a great distance.

With both Cassini's wide-angle and narrow-angle cameras aimed at Saturn, Cassini was able to capture 323 images in just over four hours. This final mosaic uses 141 of those wide-angle images. Images taken using the red, green and blue spectral filters of the wide-angle camera were combined and mosaicked together to create this natural-color view...

...This image spans about 404,880 miles (651,591 kilometers) across.

For hi-res versions of this image in far greater detail, go here.