The suggested donation for the specific events listed below
includes the cost of General Admission.  
Rain or clear, we survive only on your generous donations.
Minimum suggested donations, unless otherwise noted:
$5 for each Adult
$3 Children under 14
FREE for Members.

The information below is subject to change. Check back often!
Dates are SATURDAYS unless otherwise noted.

Sep 2016  
10 “Can we reach the stars, and will they care?” Event 7:30 PM - C Bang
17 Astronomy Series 7:30pm:
Observing in the Southern Hemisphere: Chile, William Bogardus.  $10 Donation per person
23 (Friday) Members night
24 Board Meeting 4:30pm
  Astronomy Series 7:30pm:
Equinox, solstice, other seasonal basics, George Lomaga. $10 Donation per person
Oct 2016  
15 Astronomy Series 7:30pm:
Optics and Coatings,  A. Pireia. $10 Donation per person
22 Board Meeting 4:30pm
28 (Friday) Members night
Nov 2016  
5 Annual Custer Jamboree (4-5-6)
12 Astronomy Series 7:30pm:
How to Buy a Telescope - Telescope Basics, J. Norwood. $10 Donation per person
25 (Friday) Members night
26 Board Meeting 4:30pm
Dec 2016  
10 Astronomy Series 7:30pm:
“It ain’t necessarily so!”, B. Farrell. $10 Donation per person
17 Member Christmas Party (tentative)
Jan 2017  
28 Board Meeting 4:30pm
Feb 2017  
25 Board Meeting 4:30pm
March 2017  
18 St. Patrick’s Day dinner
25 Board Meeting 4:30pm
April 2017  
22 Board Meeting 4:30pm
29 Astronomy Day
May 2017  
27 Board Meeting 4:30pm
June 2017  
24 Board Meeting 4:30pm
August 2017  
21 (mon) Solar Eclipse Event (tentative)

38th Annual Astronomy Jamboree  

Saturday Night Observing:
open to public, dark to midnight, weather permitting Staff provide guided tours of the sky. Clouds, fog, rain, and full moon nights are not good nights. The less moon, the better for most observing:
Check the moon calendar!

Plan your visit by reading this and have a look at our VISITOR GUIDE to make the most
of your visit with us.


MEMBERS' NIGHT, Last Friday of each month
A Members-Only evening for mingling, observing, enjoying the observatory and its resources, discussing Custer's present and planning its future together. Coordinated by Staff Members. Admission: FREE for Members and their guests.

The musical performances are, in part, made possible by grants from the Suffolk County Community Arts Regrant Program and the NYS Council for the Arts


At Custer

Membership & Business

Sponsors, Clubs, & other Astronomical Organizations