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Various astronomical "shadow events" occur throughout the Solar System!  This month's more interesting ones are featured here.

SHADOW WORKS

Here we highlight the most awe-inspiring eclipses taking place in our Solar System.  We also set them up so that all you need to do is click on their links.  Don't forget that you can generate lists of Earth's, Jupiter's, Saturn's, Uranus's, Neptune's and even Pluto's eclipses, using CELESTIA's own built-in "Eclipse Finder."  You'll find it in the program's menu under "Navigation".

All events listed below are displayed as if viewed from Earth, their magnifications shown in parentheses at the lower right of CELESTIA's window.  Events involving more than one moon are often cyclical, so usually only the first example is given, and then the period of the cycle.

JUPITER

Simultaneous solar eclipses occur on Jupiter in October, three due to Europa's and Ganymede's resonant orbits.  Their double simultaneous eclipse on Halloween (Oct 31) is especially impressive and, on other occasions, two or more Galileans visible near Jupiter give sky-watchers a treat, even those with only modest telescopes.  Below are highlights of the 33 solar eclipses which Io, Europa, Ganymede and Callisto are responsible for this month.  Jupiter's shadow stretches eastward (to the left) this month, as it has done since its opposition with the Sun in late September.  Examples of some Galileans moving into or emerging from the Jovian shadow are included.

• Oct 2: Io and Callisto cast their shadows on Jupiter's Southern Hemisphere at the same time; by the end of the day Europa and Ganymede have cast their own shadows on Jupiter too  (1.6.x)   (1.4.1)
• Oct 4: Io "chases" Europa behind Jupiter, as it will do now about every 3½ days  (1.6.x)   (1.4.1)
• Oct 6: Ganymede emerges from Jupiter's shadow and passes Europa, as it will do about every 7 days; then Europa casts its shadow on Jupiter and passes Io  (1.6.x)   (1.4.1)
• Oct 9: Ganymede casts its shadow and passes Io and Callisto; then Europa does the same  (1.6.x)   (1.4.1)
• Oct 16: with shadows on Jupiter's west and east rim respectively, Ganymede and Europa just manage to produce the first of 3 simultaneous ("double") solar eclipses in October, (each about 7 days apart)  (1.6.x)   (1.4.1).  Here's a view of both shadows.  (1.6.x)   (1.4.1).  See them?  Right Drag for a better view.
• Oct 18: Callisto casts its shadow on Jupiter as Europa emerges from Jupiter's shadow; then Io emerges too  (1.6.x)   (1.4.1)
• Oct 23: Ganymede and Europa produce their second of 3 simultaneous ("double") solar eclipses in October, this one better than the one 7 days ago  (1.6.x)   (1.4.1)
• Oct 31: Ganymede and Europa produce their third and best simultaneous solar eclipse in October  (1.6.x)   (1.4.1)

SATURN

While CELESTIA 1.6.x shows the shadows of Titan, Rhea, Iapetus, Dione and Tethys, version 1.4.1 displays only the shadows of Titan, Rhea & Iapetus.  So, 1.6.x and 1.4.1 respectively show 32 and 5 solar eclipses on Saturn in October, 1.6.x revealing a few simultaneous solar eclipses.  The highlights are as follows:

• Oct 2: Tethys casts its shadow in Saturn, as it currently does about every 2 days;  (1.6.x only)
• Oct 3: Dione casts its shadow on Saturn, as it currently does about every 2¾ days;  (1.6.x only)
• Oct 3: Rhea casts its shadow in Saturn, as it currently does about every 4½ days;  (1.6.x)
  (1.4.1)
• Oct 6: Tethys and Dione cast their shadows on Saturn simultaneously  (1.6.x only)
• Oct 8: Tethys and Rhea cast their shadows on Saturn simultaneously  (1.6.x only)
• Oct 17: Rhea and Dione cast their shadows on Saturn simultaneously  (1.6.x only)

URANUS, NEPTUNE & Dwarf Planet PLUTO

Neither Uranus nor Neptune will experience eclipses for decades.  Dwarf planet Pluto will experience no eclipses by Charon for about a century!