Space Center Houston later this summer will display an exhibit of a SpaceX Falcon 9 rocket booster outside the facility at 1601 E. NASA Parkway, Houston. The 135-foot-long first-stage booster will be displayed horizontally 14 feet off the ground, giving visitors a chance to walk beneath and around it. It is one of only two SpaceX Falcon 9 boosters on public display and the first commercial space exhibit at Space Center Houston.  The future of spaceflight is reusable rockets, which the Falcon 9 helped prove was possible. 281-244-2100. www.spacecenter.org