The Herrett Center for Arts & Science

The Centennial Observatory

The observatory features one of the world's largest fully wheelchair-accessible public telescopes.  The main instrument is the Norman Herrett telescope, a 24" Ritchey-Chrétien reflector on a computer-controlled fork mount, manufactured by DFM Engineering of Longmont, Colorado, USA.  The observatory features an elevator to take visitors to its second-story location at the south end of the museum.  Once there, a wheelchair elevator is available to lift visitors with limited mobility to the observing deck under a six meter (20 foot) motorized dome manufactured by Observa-Dome of Jackson, Mississippi, USA.  The ARE-125, an optical "periscope" designed by DFM, allows unprecedented access to the telescope for wheelchair bound or limited mobility visitors.  An Apogee Alta E47+ CCD camera is available for imaging, a generous gift of Dick and Jody Shotwell.

Observatory Telescope

For More Information Contact:

The Herrett Center for Arts & Science
The College of Southern Idaho
315 Falls Avenue
Twin Falls, ID 83301
Museum Front Desk: (208) 732-6655
Planetarium Ticket Sales: (208) 736-3059
Star Line Sky Info: (208) 732-MOON (732-6666)
Fax: (208) 736-4712

  Observatory Open Hours &
Admission Prices
  Monthly Star Parties:
  2nd Saturday of the month, year round (weather permitting).
Time: One hour after sunset to Midnight.
Admission: FREE
  Astronomy Talk Nights:
  Following bimonthly astronomy talk (Thursday nearest the new Moon in odd months). Weather permitting.
Time: Varies seasonally, two hours long.
Admission: $1.50 per person (children 6 and under are free) or FREE with admission to astronomy talk or planetarium show.
  Summer Solar Sessions:
  Wednesdays, Memorial Day through Labor Day (weather permitting).
Time: 1:30 PM to 3:30 PM
Admission: FREE
  Telescope Tuesdays:
  2nd and 4th Tuesdays of the month, November through February (weather permitting).
Time: 1 hour after sunset to 9:00 PM.
Admission: $1.50 per person (children 6 and under are free) or FREE with planetarium show admission.


Centennial Observatory Clear Sky Chart
Centennial Observatory Clear Sky Chart