One of the weirder headlines of the week: Giant Propellers Discovered In Saturn's Rings. It's a tad misleading. They don't spin or anything. And as far as I can make out, they aren't even really solid. The center is a brand new class of moon, one that is mid-size and embedded in the rings, and (I think) there is material streaming out thousands of miles in both directions, held in place by gravity and resonance, a concept I must admit I don't entirely understand.
As opposed to gravity, which no one understands. There was an article in the NY Times yesterday about a theory that gravity doesn't even exist, but is rather a byproduct of thermodynamics. I didn't entirely understand that either.
I digress. These space propellers are several miles wide, several thousand miles long. Their orbits are thus far unpredictable; they've been photographed before, but no one is sure when and where one of the Damned Things will turn up next. A picture of one is below. Unlike the propeller, the red arrow is not actually embedded in the rings. That would be weird.
Odd headline #2: Frustrating Zombie Satellite Still Adrift In Space. Apparently it is out of its intended orbit and can't be controlled, but is still sending out signals, and signal interference could kill other satellites. Following the zombie analogy, those satellites it kills would then turn into zombie satellites, causing all sorts of mayhem up there, but I think I may be stretching the analogy too far.
Photo by NASA's ever-fascinating Cassini probe.
