The morning started with this nacreous cloud, which preceded the Sun over the roof of the Denver Museum of Nature and Science.

Bryan White had time before his presentation to make a 3D image.

Photo by Ron Pearson

John Anderson's home-made spectroscope and his triple-telescope white light, hydrogen- alpha, and calcium spectra setup were very popular. Todd Hitch (in red) looks on.

Photo by Ron Pearson

A young visitor gets his first view of the Sun and a sun spot through Wayne Kaaz's filtered 10-in Richey-Cretien telescope.

Photo by Ron Pearson

As the afternoon progressed, the observing line got longer. Many people stopped by as they walked to and from the "Boo at the Zoo."

Photo by Ron Pearson

Dr. Roger N. Clark's popular lecture on "Water in the Saturn System" featured some recent discoveries and photographs from the Cassini mission that had not yet been published.

The question and answer session went on for 30 minutes.

Photo by Ron Pearson