The Toronto-based tour operator G.A.P. has created three itineraries centered on "space experiences" in Russia. On the three-day "Space Adventure: The Edge of the Earth," guests fly in a MIG-31 jet fighter and, while on ground, visit the Monino Air Museum. "Zero Gravity Adventure," meanwhile, takes guests to Chkailovsky Air Base, just outside of Moscow, to undergo one day of cosmonaut training to fly 34,000 feet into the atmosphere and experience zero gravity. For those who prefer to experience zero gravity on the ground, G.A.P. has created "Cosmonaut for a Day," where guests spend five days training as a cosmonaut, eating space food and taking part in space simulators. Visit www.gapadventures.com. (JM)