Tag Archives: tethys

Night time on Saturn and Tethys

Night time on Saturn and its moon Tethys
Night time on Saturn and its moon Tethys

Darkness falls on the night side of massive Saturn and its tiny moon Tethys. Tethys is literally quite tiny as it is just 1,062 kilometers across and in this picture, is just barely seen (thanks to being brightened by NASA in post production) in the lower left quadrant.

The Cassini spacecraft took this picture with its wide-angle camera, utilizing a special filter allows near-infrared light wavelengths. It was taken when Cassini was about 2.4 million kilometers from Saturn.

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Tethys and Rhea lined up

Cassini captures Tethys and Rhea aligned
Cassini captures Tethys and Rhea aligned

We start off a new year, 2015, with an interesting cosmic alignment. Here we see two of Saturn’s moons; Tethys and Rhea nicely lined up with about a quarter of each in shadow. This picture was taken by the Cassini probe’s narrow-angle camera in red light at a distance of about 1.8 million kilometers from Rhea. The lit side of the moons is the one facing away from Saturn.

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Tethys hanging from Saturn’s ring

Saturn's moon Tethys, hanging from on its rings
Saturn’s moon Tethys, appears to be hanging from the planet’s rings

The Cassini orbiter used its narrow angle camera to photograph Saturn’s moon Tethys from this interesting angle, at a distance of 1.8 million kilometers. In this picture the 1,062 kilometer wide icy moon appears to be hanging off of Saturn’s A and F rings. Along with the bright white Saturn-facing hemisphere of┬áTethys, we also get to see how flat Saturn’s rings really are – supposedly only approximately 10 meters high/thick while being 300,000 kilometers across.

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