Guests visiting in groups of 20+ are eligible for discounted general admission pricing and are required to pre-register at the following rates.

Group Weekday Rates | Available on Wednesday, Thursday, and Friday until 5:00pm  

  • General Admission:
    • Required in addition to any desired add-on experiences
    • $11/adult, $9/child (Ages 2-12) or senior (65+)
    • Valid for general admission only 
    • Tickets must be purchased in advance here to be eligible for discount
    • Programs, lunch spaces and public planetarium shows are unavailable 
  • Changing Exhibit:
    • Available October through May
    • Tickets to the Changing Exhibit may be added for an additional cost, learn more here
    • More information on the current Changing Exhibit can be found here

Group Weekend Rates | Available on Saturday from 10:00am to 5:00pm and Sunday from 12:00 - 4:00pm

  • General Admission: 
    • Required in addition to any desired add-on experiences
    • $11/adult, $9/child (Ages 2-12) or senior (65+)
    • Valid for general admission only 
    • Tickets must be purchased in advance here
  • Acheson Planetarium: 
    • Up to 35 non-refundable tickets for public planetarium shows may be pre-purchased for $5/person can be purchased in advance here
    • Learn more about the daily schedule of available shows here
    • Planetarium show tickets may also be purchased upon arrival; however, they are first-come, first-served and subject to limited availability
    • Lunch space is available on a first-come, first served basis
  • Observatory:
    • Open every Friday from 8:30pm - 10:00pm during Standard Time, 7:30pm - 10:00pm during Daylight Savings Time, and the first Sunday of the month from 1:00pm - 4:00pm 
    • Included with general admission ticket 
  • Changing Exhibit:
    • Available October through May
    • Tickets to the Changing Exhibit may be added for an additional cost, learn more here
    • More information on the current Changing Exhibit can be found here

Group admission rates are valid during standard public Institute hours. Please note that hours and prices are subject to change without notice. 

For questions or special accommodation requests, please call 248-645-3210 or email us at cisreservations@cranbrook.edu.