Enjoy a barbecue cookout and...Location: Parking Lot (in Cunningham Park), QueensCost: FreeStargazing9:00 p.m.Observe Mars, Venus, Saturn and other heavenly bodies with the Amateur Astronomers...Location: Fort Greene Park Visitor Center (in Fort Greene Park), BrooklynCost: FreeSunday, August 1, 2010Canoe the Meer11:00 a.m. - 3:00 p.m.A fun-filled day of canoeing and water safety.