[Lvas] Hard Science

[David Blanchette]

At 11:40 AM 2/19/2009, you wrote:
>David,
>
>Totally awesome, can't wait!
>Is this another "once" in a life time?


I don't know, really.  Obviously, it only happens twice in a Saturn 
orbit (every 15 years), when the plane of the moon orbits (same as 
the rings) goes edge on.  Then you have to get a bunch of the moons 
together at one time.  Jupiter's moons get together like this more 
often (every 6 years), but you don't often get more than one 
transit/shadow at a time.

-- David