Dr. E.C. Krupp explains, a bronze-faced meridian arc displays the meridian line and is inscribed with month and day markings, seasonal and lunar indicators, and constellation figures. The arc is 18 feet long and 13.5 feet high. Each day at local noon, as the Sun passes, the spot of sunlight moves across the meridian on the 7-inch arc and enables visitors to see how the Sun's progress is linked to the calendar.
Griffith Observatory celebrated its 75th birthday with two public events on Friday, May 14. Los Angeles City Councilmember Tom LaBonge presented a proclamation to Observatory Director Dr. E.C. Krupp, a birthday balloon display from the telescope domes, a presentation of astronomical cupcakes, and an architectural model of the Observatory illuminated by the light from the star Gemma, who light waves traveled through space 75 years before reaching earth. Los Angeles, CA. 5/14/2010. photo by John McCoy/staff photographer