Saturn

Astronomy science Saturn space aurora - 7780503808
By Unknown
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The dancing light of the auroras on Saturn behaves differently from how scientists had thought possible. By choreographing the instruments aboard the Earth-orbiting Hubble Space Telescope and the Cassini spacecraft, while it was enroute to Saturn, to look at Saturn's southern polar region, scientists found in 2005 that the planet's auroras, long thought of as a cross between those of Earth and Jupiter, are fundamentally unlike those observed on either of the other two planets.
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Have Your Picture Taken By the Cassini Spacecraft!

On July 19th the Cassini will be taking a photo of Earth from 900 million miles away. So, on the 19th when you see Saturn in the sky be sure to wave hello to Cassini!

wave Astronomy science Saturn funny Cassini - 96517
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Astronomy moon Saturn science titan - 8236546048
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The hint comes in the form of a ratio. All elements have a certain number of known isotopes — variants of that element with the same number of protons that differ in their number of neutrons. The ratio of one isotope to another isotope is a crucial diagnostic tool.

In planetary atmospheres and surface materials, the amount of one isotope relative to another isotope is closely tied to the conditions under which materials form. Any change in the ratio will allow scientists to deduce an age for that material...

"When we looked closely at how this ratio could evolve with time, we found that it was impossible for it to change significantly," Mandt said in a press release. "Titan's atmosphere contains so much nitrogen that no process can significantly modify this tracer even given more than four billion years of Solar System history."
moon Astronomy science Saturn dione funny - 8372267008
Via NASA
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This cylindrical projection global map is one of six new color maps of Saturn's midsized icy moons, constructed using 10 years of image data from the Cassini spacecraft. Discovered by Cassini (the astronomer) in 1684, Dione is about 1,120 kilometers across. Based on data extending from infrared to ultraviolet, the full resolution of this latest space-age map is 250 meters per pixel.
hula hoop planet Saturn space - 6179965184
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Kids, don't hula hoop, or else giant gaseous planets will descend into our atmosphere and kill everyone. This has been your PSA for the day.