Le stelle della matematica di Torino

Un articolo fondamentale per le Torinesi:

Le prime astronome dell’Osservatorio di Torino: Le signore delle stelle di inizio Novecento

di Gabriella Bernardi

Rivista Savej

"La Facoltà di matematica di Torino è frequentata da non poche signorine, alcune delle quali hanno veramente attitudine per quegli studi severi. Se poi il posto di assistente alle cattedre del primo biennio si desse per concorso, facilmente questo sarebbe vinto da una delle Dottoresse ora dette."

padre Giovanni Boccardi

Astronomical Analysis of Diagonal Avenues of Washington

An Astronomical Analysis of Some of the Diagonal Avenues of Washington
PHILICA, 2016,Article 613 Available at SSRN

 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2789700

Amelia Carolina Sparavigna

Here we are proposing an astronomical analysis of the directions of some of the diagonal avenues of Washington, made by means of satellite images and a modern ephemeris, the Photographer’s Ephemeris, a well-known software used for planning outdoor photography. Some diagonal streets of Washington seem had been aligned along the northern moonrise azimuth of 1791, the year the engineer Pierre Charles L’Enfant started the survey for planning the town for George Washington, and along the southern moonrise azimuths of 1792, the year the surveyor Andrew Ellicott revised the plan. In this manner, in the directions of some diagonal avenues, the engineers that worked on the urban project, introduced a reference to the years of their plans for the Capital of the United States.
Keywords: Astronomy, Satellite Images, Architecture, Modern Ephemerides, Urban Planning

 Copy of the U.S. Coast and Geodetic Survey, Washington, D.C. (1887).

Detail of Figure 1, with some diagonal avenues of L’Enfant Plan and angles.

A detail of the faint original map of 1791 (https://www.loc.gov/item/88694205/) after a processing of the image.

Google map of Washington.

Snapshot of the Photographer s Ephemeris for Washington on October 3, 2015.  The blue lines are the moonrise and moonset azimuths, the yellow and orange lines those of sunrise and sunset. Note the coincidence to the diagonal avenues.

Snapshot of the Photographer s Ephemeris for Washington on October 3, 2015. 

  

Snapshot of the Photographer s Ephemeris for Washington on October 18, 2015.