Europa & Io passing over Jupiter’s Great Red Spot, shot from space probe Cassini.

for everyone asking if this is real footage: yeah!

It is an extremely accelerated timelapse made by Kevin Gill, the movement here is more a matter of Cassini whipping past Jupiter at astounding speeds than the motion of the moons, which is why there’s such a large parallax shift, but it’s actual images taken during the Cassini flyby. They did another one of Titan orbiting Saturn, you can see that at the end of this video. [Flickr link]