Io eclipses and transits Ganymede

I give a tip of the hat to Jason Perry at The Gish Bar Times and a Wayne's World-style "We're not worthy" bow and scrape to amateur astronomer Christopher Go for this incredible animation. Go observed a mutual event of two of Jupiter's moons, smaller Io and great big Ganymede, in which first Io's shadow and then the moon itself passed in front of Ganymede as seen from his observing site in the Philippines.