by Akkana Peck
This Java applet shows the positions of the four Galilean satellites of Jupiter:
Io, Europa, Ganymede, and Callisto.
To show the positions of the moons at a different times, days, or years,
edit the date text field then hit return to recalculate.
If your system is currently using daylight savings time,
there is a bug in the Java engine of some navigators, including
both MS Internet Explorer 3.0 and Netscape versions 3.01 and earlier,
which incorrectly adds 1 to the date typed in, even if
you specify daylight savings time (e.g. "PDT") or UTC in the
Netscape 4.0 does NOT have this bug.
To work around this bug, if your system is currently using daylight
saving time, you will have to specify a time one hour earlier than
the time for which you really want to see the moons.
Copyright 1996 by Akkana Peck (http://www.best.com/~akkana).
Most of the equations come from Jean Meeus'