Are you a fan of NASA and the U.S. space program? Want to talk to an astronaut? See a real rocket engine? Then plan to drop by downtown Huntsville Saturday morning when City Hall and the Marshall Space Flight Center host the city's annual "NASA in the Park" festival.

The event features more than 60 exhibits and demonstrations by NASA experts, performances by Marshall musicians, games and activities for all ages. Marshall center Director Todd May, Mayor Tommy Battle and astronaut Robert "Hoot" Gibson will be there.

Also on the scene will be an RS-25 rocket engine that will power NASA's new Space Launch System and an exhibit of NASA 3-D printing.

The event runs from 10 a.m. until 3 p.m. in Big Spring Park East.