Are you ready to take your astronomical interest to the next level? Welcome!
The Rittenhouse Astronomical Society is the astronomy club for everyone.
 Join us on the second Wednesday of each month September through June at the Franklin Institute.
Check out recent guest speakers.    Consider meeting with others who share an interest in astronomy!    
Wondering what is in the sky this month? Bring your questions, and your enthusiasm to learn. Open to all with no admittance fee.
  Free, informative ,enlightening and fun.  No obligation to join.


~What's new on the Society Website~



Muddy Run

Holtwood PA
NASA Night Sky Network

Next Open House
April 14





Our Upcoming Meeting

April 17th (Tuesday Meeting)
@ The Franklin Institute

" The Bizarre Cigar
From Another Star " 

Meeting Notice

Guest Presenter:  Robert Naeye
Freelance Journalist, Former editor in chief of Sky and Telescope


For you future planning,
2018 we change our meeting night
 to Third Tuesday of the Month
At the Franklin Institute

May 15, 2018  @ The Franklin Institute
Dr. Hein Nguyen
Senior JPL Research Scientist / Astronomer
Physics: Cal. Tech.
Face time Presentation
[ Meeting Notice ]

June 19, 2018 @ The Franklin Institute
Open House, Members Presentations
Call for presentations: Open to all current members



We Return again this year:
September  7, 8, & 9 / 2018

Wyoming High Country Lodge
Star Watch Weekend:

The Closest  you can stay to Medicine Wheel!  Bighorn Wyoming has some of the darkest skies in the nation.  Join Ted Williams (RAS President) as he returns to WHCL as a featured speaker 2 miles from Medicine Wheel.  This historic "Mystical site" is a featured visit during your weekend stay at the Lodge. 
Reserve Early for a choice of Lodge or Cabin


Please review or feel free to download and share
Thanks for member submissions, they are greatly appreciated


Rittenhouse Astronomical Society  is now a recognized IRC Section 501 (c)(3) public charity under IRC section 170
eligible for tax deductible bequests, devises, transfers or gifts under sections 2055, 2106 or 2522
Receipt of your greatly appreciated donation will be e-mailed to you

 Membership Donation

  Big Bang Donation
(You Determine what you can contribute, DOES NOT include Membership)



Previous Speakers this Year


March 20, 2018
Dr. Derrick Pitts
Chief Astronomer: The Franklin Institute
     [ Meeting Notice ]

February 20, 2018
Professor Eric L. N. Jensen: Exoplanets
Swathmore Astronomy
     [ Meeting Notice ]

January 16,  2018
Louis Berman: Scope Seeing
Delaware Valley Amateur Astronomers
     [ Meeting Notice ]


January 6, 2018
Dr. Robert Nemiroff: Astronomy Picture of the Day
Michigan Technical University
    [ Meeting Notice ]

December 12, 2017
David Brown: Rittenhouse, Past & Future
JPL/ Long time Member
     [ Meeting Notice ]

November 8, 2017
Diane Turnshek - Light Pollution Defense Kit
Dept. of Physics at Carnegie Mellon University / Physics and Astronomy at University of Pittsburgh
     [ Meeting Notice ]
TED Talk

Dr. Paul Halpern
University of the Sciences
 The Quantum Labyrinth

Olivia Koski: Vacation Guide to the Solar Vacation Guide to our Solar System
(Guerilla Science)

We conduct our business at our monthly meetings. 
If you have questions about our Society you can contact us at:

Although we have no secretaries standing  by,
volunteer officers have access to this mail box.
and will check periodically throughout the summer months..

Our Summer Newsletter 2017:



☼ Check out some recent guest speakers and Events.



We share articles submitted by our members on or about the Cross Quarter day of each season.  If members have nothing to say, newsletter is held till articles are submitted.  Any member is welcome to submit an article for our newsletter.


Winter 2016-17

Summer 2016

Winter 2015-16

Summer 2015

 Winter 2014-15

Fall 2014

Summer 2014

Spring 2014


 Previously on this past orbit: 





How do I enter the building if it is after museum hours?
Employee entrance shown on map is always open. 
There is a security official sitting just inside the door.
If you park in the garage, you enter through the Atrium.
Information desk or security will direct you to the meeting location.

Learn More about David Rittenhouse
Back to What's New on our Website

Last Updated  3-26-18
Rittenhouse Astronomical Society By-Laws

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