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100 Hours of Astronomy Event - U.S. Naval Observatory IYA 2009 Open House

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100 Hours of Astronomy Event - U.S. Naval Observatory IYA 2009 Open House

100 Hours of Astronomy Event

Number of telescopes and binoculars:	22
Number of amateur participants:	26
Number of public observing (best estimate):	9000
Public comments/impressions:	"Wow", "Cool", Awesome", "Thank you so much for doing this", "Honey, he made that telescope", "Check out this amazing picture of Saturn...wait, that's the real Saturn?" etc.
Viewing conditions:	A bit breezy, otherwise superb!
Objects viewed:	Sun, Moon, Saturn, various double stars, M42.
Types of telescopes used:	15-inch home-built Dobsonian, 12-inch Clark/Saegmuller rerfactor, 12-inch LightBridge, 12-inch LX200, Celestron 11, 10-inch Europa Newtonian, several 8-inch SCT's and Newtonian/Dobsonians, many smaller instruments.
Organizer Comments:	An amazing turnout considering we were up against the Cherry Blossom Festival and the "Jeopardy" regional tryouts. :-) The crowds were interested, respectful, eager to learn, enthusiastic despite long lines to get to some of the telescopes, and everybody had a good time. I had two scopes set up on the lawn, my 80mm Antares Sentinel on an iOptron Cube mount and my 25-year old home-built 8-inch Dobsonian, "Ol' Blue Eye". Between 18:00 - 2200 I never had fewer than 20 people in line for each scope. I'd say 90% of the people who passed through had never looked through a telescope before! The event far exceeded our wildest expectations! Geoff Chester
Direct URL to photos:	Direct link
Method used to estimate public attendance:	"Clicker" counter at main entry area. "Official" count was 8336, but during peak entry times it wasn't possible to count everyone. We estimate at least a 10% undercount.

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