Moon has come and gone, but I still want to do a theme post.
Transit of Mercury.
Transits of Venus happen in eight-year pairs. Wikipedia says "They occur in a pattern that generally repeats every 243 years, with pairs of transits eight years apart separated by long gaps of 121.5 years and 105.5 years."
The last pair was in 2004 and 2012. I observed neither.
On Mars, the larger moon Phobos is only good for partial occlusion of the sun's disk.
Jupiter receives regular eclipses from its larger "Galilean" moons. But the coolness is viewing a moon eclipsing the sun from another moon.
I will say that the most amazing eclipses in our solar system must be of saturn as seen from an outer moon. Cassini (the Saturn probe) pics gave us a preview.
Uranus has an equatorial plane nearly 90 degrees tilted to its orbital (ecliptic) plane. So eclipses happen every half-orbit or 41 years.
For Neptune, I am stuck with artist's renditions. However the prospect of Triton blocking the sun is lovely to contemplate.
I finish with a Terrestrial image: a pair of "big wing" B-57s (precursors of the U-2) watching a local eclipse.