Folks lucky enough to live in Europe will be able to see a triple total solar eclipse (triple shadow transit) on Jupiter, tomorrow night (early Saturday morning, technically). At least a 5 cm diameter telescope will be required to see this.
It lasts from 4:32 until 5:37 AM UT. The east coast of the US can see it too, although Jupiter will be very low in the east for those observers.
How do I know If see it? Looks like a single total solar eclipse?
You'll see three black dots about 1.5 arcseconds in diameter travelling across the face of Jupiter. Those are the shadows of three of the Galilean Moons. It's sorta what a total solar eclipse on the Earth would look like when viewed from space, except the shadows are bigger, and there will be three of them!