Where else can you stand at the edge of a black hole, work hand-in-clamp with a robot, or land on the moon? Three linked pavilions overflow with exhibits on space and technology. The Human Body, the Information Highway, and the Sport Show are major exhibits, and the domed Omnimax theater shows films on subjects from deep space to deep science. You'll probably need an entire day. To get here, take the Yonge St. subway from downtown to Eglinton station and No. 34 Eglinton East bus to Don Mills Rd. stop; then walk 1/2 block south. COST: $12; Omnimax films $10 each; parking $7.