[AZ-Observing] Saturn's Rings: Time-lapse

  • From: "Tom Polakis" <tpolakis@xxxxxxx>
  • To: <AZ-Observing@xxxxxxxxxxxxx>
  • Date: Sun, 8 Mar 2009 14:03:05 -0700

I have been putting together a time-lapse animation of the rings of
Saturn opening since their minimum late last year.  Last night, I added
the third frame, and put the result here:
Since I have scaled the images up, and just taken what the seeing
offers, the images are rough around the edges.  Note how much the rings
have brightened in last night's image, when Saturn was at opposition.
This is called the Seeliger effect, and you also see it when you look
into a forest exactly opposite the sun when the sun is low.  The
flare-up is due to the lack of shadows when the light source is coming
from behind.  It was also prominent as a brightening of the lunar soil
in a lot of the Apollo pictures.

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