Don't forget to Check Our Weather!
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:
$5 for each Adult
$3 Children under 14
FREE for Members.

The information below is subject to change. Check back often!

July 16 Astronomy Series – S. Bellavia: The BNL LSST Project
July 23 Board meeting – 4:30PM
July 29 (fri) Members night
Aug 26(fri) Members night
Aug 27 Astronomy Series – J. Haupt: Radio Astronomy Overview
Sept 23(fri) Members night
Sept 24 Astronomy Series – G. Lomaga: Equinox, Solstice, & other seasonal basics
  Board meeting 4:30PM
Oct 15 Astronomy Series – A. Pireia: Optics and Coatings
Oct 22 Board meeting 4:30PM
Oct 28 (fri) Members night
Nov 5 Annual Custer Jamboree (Nov 4,5, 6)
Nov 12 Astronomy Series – J. Norwood: How to buy a telescope & Telescope basics
Nov 25(fri) Members night
Nov 26 Board meeting 4:30PM
Dec 10 Astronomy Series – B. Farrell: It Ain't Necessarily So
Dec 17 Board meeting 4:30PM
  Member Christmas Party (tentative)
Dec 30 Members night

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