Prometheus — moon orbiting Saturn, shown live in Cosmoscope, a real-time 3D map of the universe.
The F ring’s inner shepherd — a potato-shaped moon that dips into the ring each orbit, dragging out dark channels and streamers like a finger through smoke.
Cosmoscope puts Prometheus at its true position in the solar system, computed from JPL-derived ephemeris and updated continuously. Open the live 3D view to see, in real time, how far Prometheus is from the Sun and from Earth right now, how many minutes or hours light takes to cross that gap, and how fast it is moving along its orbit. Scrub the timeline to place Prometheus where it was on any past date, or where it will be years from now.