318-8726, recording 318-8200, off AZ Hwy. 86 (Ajo-Tucson Hwy.), south on State Route 386. $4/adult, $2.50/child 6-12, under 6 free. 9 a.m.-3:45 p.m. daily Allow 2-3 hours. Tour one of the world's leading observatory complexes. See the world's greatest concentration of telescopes for stellar, solar, and planetary research. Exhibits on astronomy and facility's history at visitor center. Self-guided tour available. No food facilities.
