Built in 1932, the observatory's original instrument was an 82-inch reflector; a 107-inch reflector is in a larger dome. Interpretive programs in the George T. Abell Gallery highlight the Hobby-Eberly Telescope, one of the world's largest.
Visit the website for admission charges and information on special viewing nights, Decoding Starlight exhibit, solar viewings, guided tours and Star Parties.
The visitors center, at the foot of Mount Locke, is open 10 a.m.-5:30 p.m. daily. Closed Thanksgiving, Christmas and New Year's Day.
16 miles northwest via Texas 118, Spur 78.