Astronomy and the Scientific Birth of a Nation
The Life and Legacy of an Astronomer Patriot
Ron Urioste 2026
Franklin Township Astronomy Club
Night sky over Philadelphia July 4,1776 11:00 pm
Part I:�A New Country Looks to the Stars
These are the times that try men’s souls…
In no instance hath nature made the satellite larger than its primary planet; and as England and America, with respect to each other, reverse the common order of nature, it is evident that they belong to different systems. England to Europe: America to itself.
Thomas Paine 1737-1809
Common Sense – published 1776
Such had been my fixation of mind, when I surrendered�the reigns of my imagination to the guidance of�the ingenious author of Common Sense—we found�other suns and other worlds innumerable, who�might only be considered as Presidents, not �Monarchs, of the vast system; every where shone a�republic amidst the stars,
the various constellations which spangle�the sky, united upon the principles of perfect �equality; and gravitating towards each other, with�wonderful adjustment, mutually attracted and �mutually repelled.
Pennsylvania Ledger, April 27, 1776 – Anonymous response
To “Common Sense”
“A Republic Amidst
the Stars”
“Midnight Ride” of Paul Revere
Lexington, MA
18 April 1775
Part II:�The Astronomer Patriot
This Photo by Unknown Author is licensed under CC BY-NC-ND
Who was the most important scientist of the Revolutionary War?
It’s all about the Benjamin…
Maybe not…
Allow me to introduce myself…
David Rittenhouse
David Rittenhouse:�A Self-taught Genius?
Building Time
Mastering �Mathematics
The Man who Measured America
Rittenhouse Surveyor's Transit
Rittenhouse Vernier Compass
Rittenhouse, Mason and Dixon
Washington’s Compass (and eyeglasses!)
Newburgh 16th Feby 1783
Sir,
I have been honored with your letter of the 7th, and beg you to accept my sincere thanks for the favor conferred on me in the Glasses – which are very fine – but more particularly for the flattering expressions which accompanied the present.
The Spectacles suit my Eyes extremely well – as I am persuaded the Reading Glasses also will when I get more accustomed to the use of them – At present, I find some difficulty in coming at the proper Focus – but when I do obtain it, they magnify perfectly, and shew those letters very distinctly which at first appear like a mist – blended together & confused.
I send the amount of the Silver Smiths charge – and with great esteem & respect am
Sir, Yr Most Obedt & Hble Ser�Go Washington
Part III:�Science Builds a Nation
This Photo by Unknown Author is licensed under CC BY-SA
America’s First Great Scientific Moment: June 3, 1769
The Transit of Venus
A transit of Venus occurs when the planet passes directly between the Sun and Earth, appearing as a small, dark dot moving across the solar disk.
Because transits of Venus are incredibly rare, they occur in a unique "pair of pairs" pattern that repeats every 243 years, with decades or over a century between pairs.
The Last Pair: The most recent pair of transits happened on June 8, 2004, and June 5–6, 2012.
The Next Transit: The next transit of Venus will not occur until December 2117, followed by another in December 2125. The cycle begins again in 2247,
Historical Frequency: Before the 2004 transit, no living person had ever witnessed a Venus transit, as the previous one took place in 1882.
2012
The Fainting Astronomer
Statehouse Garden Observatory
Norriton Observatory
Rittenhouse Home
The Meteor Letter
Washington Crossing the Delaware
25-26 December 1776
An Orrery of the Sun, Earth and Moon
Peyton Hall Orrery – Princeton University
The Rittenhouse Orrery�University of Pennsylvania
America Joins World Science
Charles César Robin
Christoph Daniel Ebeling
War – How the Mighty Have Fallen!
Part IV:�Legacy and the New Republic
This Photo by Unknown Author is licensed under CC BY
The Revolutionary Scientist
Engineering and Defense: On October 27, 1775, Rittenhouse was appointed as the Pennsylvania Committee of Safety engineer, using his mechanical expertise to design fortifications and defense mechanisms to protect Philadelphia.
Filling Political Vacancies: In March 1776, he was elected to the Pennsylvania Assembly to fill the seat vacated by Benjamin Franklin.
Drafting the Constitution: By July 1776, he was a key delegate to the convention tasked with drafting the new Pennsylvania state constitution, serving on committees that created the preamble, declaration of rights, and framework of government.
Jefferson’s “hero”
“We have supposed Mr. Rittenhouse second to no astronomer living: that in genius he must be the first, because he is self-taught. As an artist he has exhibited as great a proof of mechanical genius as the world has ever produced. He has not indeed made a world; but he has by imitation approached nearer its Maker than any man who has lived from the creation to this day. . . . Mr. Rittenhouse’s model of the planetary system has the plagiary appellation of an Orrery.
T. Jefferson - Notes on the State of Virginia, 1785
The Revolution’s Intellectual Network
Rittenhouse’s Astronomical Legacy
Building the New Republic
The “Forgotten” Founding Founder��David Rittenhouse�(1732-1796)��Astronomer�Patriot��
A Revolutionary Legacy
Battle of Yorktown
(the last evening)
18 October 1781
Yorktown, VA
“Astronomers are greater men than politicians because they find new worlds while politicians find only new governments”
- Thomas Jefferson
Sources and citations