Saturday night is the last sunset before the Summer Solstice, with Sunday as the longest day of the year. If the skies are clear, it could be a great night for star-gazing at the century-old Northmoor Observatory in Donovan Park. The Peoria Astronomical Society is in its 71st season of hosting public viewings each Saturday, from mid-May into October. Society president Dan Son and program chair Chris Schmidt talk tells WCBU's Joe Deacon what the viewings offer. Starting with Schmidt.