The public is invited to the free celebration from 6:30 p.m. to 9:30 p.m. at Como Park Elementary School at 780 Wheelock ...

The planetarium — named for Ball State alumnus and benefactor Charles ... full-dome digital projectors and an opto-mechanical star projector capable of recreating the night sky at a resolution ...

on April 17. The party also will feature the “star ball,” the star projector that was used by the planetarium until around the early 2000s before it was replaced by a digital system.