cwnl:
Movement of the Four Galilean Jupiter Moons during One Autumn Evening
Copyright: Thomas Hebbeker
The time axis runs vertically, from top to down. The composite consists of 32 pictures, taken every 10 minutes with a Newton telescope, on Oct 30, 2011, from Belgium.
The moons are, from left to right, at the top of the picture: Ganymede, Europa, Callisto, Io.
The face of Jupiter, photographed independently with a shorter exposure, and slightly magnified, was overimposed later. The rotation of Jupiter is not visible at this resolution.
I love how ganymede is SO FAR AWAY