In this beautiful image from Cassini we see a dramatically-lit Saturn, its rings slicing across its equator as a thin bright line and casting shadows onto its atmosphere below. A great example of how Saturn’s gigantic ring system is hundreds of thousands of miles wide but only about 30 feet thick! This image was captured…
Tag: Saturn
Shining Bright
Here’s a portrait of Enceladus, seen against a backdrop of Saturn’s atmosphere and ringplane seen edge-on. The ice-covered moon is one of the most reflective bodies in the solar system, bouncing back nearly all the sunlight that strikes it. Enceladus’ surface contains many different kinds of terrain, from older heavily-cratered regions to smoother, newer…
From the LITD Archives: Voyager’s Valentine
On February 14, 1990, after nearly 13 years of traveling the outer solar system the Voyager 1 spacecraft passed the orbit of Pluto and turned its camera around to take a series of photos of the planets. The image above shows those photos, isolated from the original series and labeled left to right, top to…
Happy Birthday to LITD!
Today is Lights in the Dark’s second birthday! I published my first post two years ago today, in an attempt to carry on what Bill Dunford had started with his similarly-themed blog Riding With Robots. When Bill had to step away from his blogging for a while, I asked if he’d be cool with me…
Dione’s Wispy Cliffs
First spotted by the Voyager spacecraft thirty years ago, it wasn’t until Cassini that the linear features criscrossing Saturn’s moon Dione known as “wispy lines” were confirmed to be the icy faces of high cliff walls rising hundreds of feet from the moon’s frozen surface. Possibly caused by tectonic activity Dione’s cliff walls shine brightly…
Mimas and the Rings
Mimas hovers in front of Saturn’s rings in a color image composed from raw Cassini data taken on January 31, 2011. I used data taken with Cassini’s green, infrared and ultraviolet spectral filters to compose this colorized version. Known as the “Death Star” moon, 250-mile (400 km) -wide Mimas’ northern hemisphere is dominated by the 80-mile…
Textured Trojan
First of all, get your mind out of the gutter. 😉 21-mile (35 km) -wide Helene is a “Trojan” moon of the much larger Dione, so called because it orbits Saturn within the path of Dione, 60º ahead of it. (Its little sister Trojan, 3-mile-wide Polydeuces, trails Dione at the rear 60º mark.) The Homeric…
WordPress Posting Challenge
Ok, it’s not really a challenge for me because I post an awful lot of things here on Lights in the Dark, but I think it’s great that WordPress is putting forth the effort to get more of their bloggers….well, blogging, with their Post Every Day Challenge. It’s an attempt to get people writing, regardless…
A Close Pass
Here’s a close-up look at the extensively-cratered surface of Rhea, Saturn’s second-largest moon, captured by Cassini as it performed its closest flyby yet on the morning of January 11, 2010. Passing a mere 43 miles (69 km) over the surface, Cassini got a great look at some of the deep craters that literally cover the…
Saturn’s Skyline
A raw image from Cassini taken on January 9, 2011, this minimally-composed image is actually quite fascinating (IMO): it’s a look at the upper levels of Saturn’s atmosphere in methane wavelength! Yes, Saturn is a gas giant and most of its volume is made up of hydrogen and helium, but there are layers of its…
Lines of Light
The line of Saturn’s edge – or “limb” – glows brightly with backlit sunlight, as do its rings, in this wonderful image from Cassini, color-calibrated by Gordan Ugarkovic. Beige and blue colors can be seen in the layers of Saturn’s upper atmosphere, and the distant arc of the rings seem to sink into this before…
A Saturn-Sized Storm
Earlier this week the Cassini spacecraft captured this image of an eddying storm in Saturn’s northern hemisphere. Nearly as large as the Earth, the bright clouds have been visible to amateur astronomers for several weeks and on December 27 Cassini was able to get a nice view of its own from orbit! Fantastic. See more…
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