Jack Says

More @jjrsays


Russian Tu-95 plowing the clouds


Russian Tu-95 plowing the clouds


Painter and printmaker Antonio Tempesta died on this day in 1630 at age 75. A member of Florence’s Accademia del Disegno, Tempesta studied with Santi di Tito and the northerner Joannes Stradanus. He worked with Stradanus as part of the team directed by Giorgio Vasari to decorate the Palazzo Vecchio. Tempesta later moved to Rome where he painted several frescoes at the Vatican Palace in the early 1570s. He continued to receive fresco commissions, including projects at the Villa Lante in Bagnaia (1578-90), the Palazzo Farnese in Caprarola (1579-83), and the Villa d’Este at Tivoli.

In 1593, Tempesta published his Plan of the City of Rome, an enormous print made from twelve folio-sized etchings joined together in two rows of six. When assembled, the map measures 3.5 by 8 feet. 

Reference: C. Höper. “Tempesta, Antonio.” Grove Art Online. Oxford Art Online. Oxford University Press. <http://www.oxfordartonline.com/subscriber/article/grove/art/T083701>.

Plan of the City of Rome, 1645, etching with some engraving (printed from 12 plates). New York, The Metropolitan Museum of Art, Edward Pearce Casey Fund, 1983.

Plan of the City of Rome. Part 1 with the Villa Medici and Piazza del Popolo

Plan of the City of Rome. Part 2 with the Trinita dei Monti, Palazzo Borghese and the Baths of Diocletian

The Death of Adonis, c. 1593, oil on stone, Turin, Galleria Sabauda

(via caravaggista)


Yippee, my first animations in Mathematica!

Let a circle roll around a circle twice as big. The shape traced by a point on the outer circle is a cardioid. Now consider a third circle rolling around the second one as well (again half as big, and at the same speed); its trace is already less familiar. The more circles, the more fractal-ish the resulting curve will be. In the limit, the traced curve can be described with this parametric formula:

(Source of inspiration: http://www.mathrecreation.com/2013/12/brain-curve.html)