Triple Shadow Transit of Jupiter's Moons

Below the SkyTools Visual Sky Simulation displays the shadows of three of Jupiter's moons cast onto the cloud tops of the planet.  These simulation charts are also used for star hopping (usually printed in black on white for use at the telescope).  SkyTools 3 uses a sophisticated model for sky brightness and visibility that includes light pollution, moonlight, twilight, extinction, seeing, and detection contrast.  There are three views.  Each can be individually enabled/disabled, moved about the window, and resized to fit your needs.