Horse rides and cookout: Enjoy an afternoon of horse bingo, horse soccer, food, carnival-style games and horseback rides from 1-5 p.m. today at Helen Howarth Park, 6331 94th Ave. N, Pinellas Park. Proceeds benefit the Saddle Up Riding Club. Go online tosaddleupridingclub.com or call 520-3132.
Dark side of the moon: The moon will disappear for about 31/2hours Wednesday night in the last total lunar eclipse until December 2010. The Science Center, 7701 22nd Ave. N, St. Petersburg, welcomes all to view the phenomenon through the observatory and several telescopes that will be set up by the St. Petersburg Astronomy Club from 7-11 p.m. Planetarium shows and a 50-gallon marine touch tank will be open. $5. Call 384-0027.
Underwater archaeology:Jeff Moates, curator of the Florida Maritime Museum, will talk about an underwater archaeology project along the Wacissa River in Jefferson County at 7 p.m. Thursday at the Weedon Island Preserve. The museum is in Cortez, a commercial fishing village.Best for adults; suitable for children 12 and older. Free. Registration required. Call 453-6500.