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~


March 20 (Tuesday) @ The Franklin Institute

[ Meeting Notice ]

Consider Joining us:
April 14th (Saturday Open House) @Muddy Run Park

April 17th (Tuesday Meeting) @ The Franklin Institute



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



Muddy Run

Holtwood PA
NASA Night Sky Network

Next Open House
April 14





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

May 15 (Tuesday) @ The Franklin Institute
June 19 (Tuesday) @ The Franklin Institute


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


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

This Past February  20 (Tuesday) @ The Franklin Institute
Professor Eric L. N. Jensen
Astronomy: Swathmore College

[ Meeting Notice ]


This Past January 16  (Tuesday)  @ The Franklin Institute
Louis Berman: Scope Seeing
 Delaware Valley Amateur Astronomers: President
[ Meeting Notice ]


Past Special Event,
January 6, 2018  
Special Guest Speaker, Special Date,

Dr. Robert Nemiroff
Astronomy Picture of the Day
Michigan Technical University
Creator & editor of the website Astronomy Picture of the Day, the internet's first astronomical hyperlinked educational tool relative to all levels of learning. 
William Tennent High School~ Planetarium
Centennial School District~ Warminster PA



Our  Past December 13, 2017 Meeting 7:00 PM
where the public is invited to attend free of charge.
David Brown
JPL / Longtime RAS Member
Meeting Notice: Facetime Presentation
Reflections on RAS:  1950's - 1970's

Our Society, Past & Future
Refurbishing an Edmund 6


Our  PAST November 8, 2017

Your  Light Pollution Defense Kit

Diane Turnshek -
Dept. of Physics at Carnegie Mellon University / Physics and Astronomy at University of Pittsburgh 

See her in action with her recent TED Talk
[ Meeting Notice ]


Our Guest speakers voluntarily step forward in community service to address our membership and the interested scientific community at the Franklin Institute. 
Please consider to support their endeavors in return.  Both our September and October Speakers have new publications you may be interested in
(The Solstice Season Approaches!)




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: 






If I am visiting, where do I park?

Parking in the Franklin Institute garage (entrance on 21st street) is most convenient.  
We cannot validate parking after hours and the full rate is in effect.

Street parking is fairly abundant at meeting time since many are leaving the city.
The yellow areas highlighted below have meter parking in effect till 8:00 pm.
It is more affordable to pay for the 1 hour meter fee if you arrive at 7:00 pm. 
The spots highlighted are within view of the Franklin and are a short easy walk.

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  3-20-18
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