Deep in the outer realms of our solar system, well over a billion kilometers away, something bizarre happened at Saturn’s F ring.
This is one of the latest pictures returned from the remarkable human achievement that is the Cassini spacecraft, a probe the size of a school bus that has been orbiting the ringed planet since 2004. It’s returned one incredible picture after another, and lately — as Saturn’s orbit has brought it to a point where the rings are nearly edge-on to the Sun — things have gotten not only spectacular but also really weird.
The rings are incredibly thin, only a few meters in thickness despite being hundreds of thousands of kilometers across. Over the past few months, as the Sun shines almost straight into the rings (instead of down on them), every bump and irregularity sticks out like, well, like a tree in the desert. Weird gravitational effects from Saturn’s fleet of moons tune and resonate the countless particles making up the rings, creating beautiful waves and ripples.
But this, this is something new.