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Benvenuti in queste pagine dedicate a scienza, storia ed arte. Amelia Carolina Sparavigna, Torino

Saturday, May 18, 2013

Astrophile: Saturn's egg moon Methone is made of fluff - space - 17 May 2013 - New Scientist

"Out among Saturn's menagerie of moons, a shiny white egg rests in a nest of ice crystals.
Named Methone, this small, oval moon was seen in close-up for the first time last year by NASA's Cassini spacecraft. Methone is utterly unlike the other small balls of ice and rock that dot the solar system, which are deeply scarred by impacts. Instead it is smooth, with not a hill or pockmark in sight. Now astronomers may have a clue as to why: Methone is made of lightweight fluff."Astrophile: Saturn's egg moon Methone is made of fluff - space - 17 May 2013 - New Scientist

Thursday, May 16, 2013

Assembly line

"The assembly line was invented 100 years ago. It’s time to invent the disassembly line", Steven Cherry is telling at http://spectrum.ieee.org/podcast/at-work/innovation/the-future-of-the-assembly-line
in a conversation with David Nye, professor of American history at the University of Southern Denmark.


Deep Space Beacon


Pulsed gamma rays from the Vela pulsar from photons detected by Fermi's Large Area Telescope. The Vela pulsar is the brightest persistent source of gamma rays in the sky. The bluer colour in the latter part of the pulse indicates the presence of gamma rays with energies exceeding a billion electron volts (1 GeV). For comparison, visible light has energies between two and three electron volts. Red indicates gamma rays with energies less than 300 million electron volts (MeV); green, gamma rays between 300 MeV and 1 GeV; and blue shows gamma rays greater than 1 GeV. The image frame is 30 degrees across. The background, which shows diffuse gamma-ray emission from the Milky Way, is about 15 times brighter here than it actually is.
Source Goddard Space Flight Center
Author Roger Romani (Stanford University) (Lead), Lucas Guillemot (CENBG), Francis Reddy (SPSYS)

Saturday, May 11, 2013

Earth seen from Apollo


Courtesy: NASA, Apollo 11

Bellissima!


Courtesy: NASA Apollo 8

Sun reflection


Courtesy: NASA Apollo 8

View of Earth as photographed by the Apollo 8 astronauts on their return trip from the moon. The terminator crosses Australia. India is visible. The sun reflection is within the Indian Ocean.

Saturday, May 4, 2013

Nanocanyons in Multilayer Laue Lenses

Nanocanyons in Multilayer Laue Lenses

 Brookhaven National Laboratory:  A scanning electron microscope captured this from the bottom of a trench carved by reactive ion etching. 

Caesar and Arles



Image processing of the Arles bust 

It was probably between 49 and 46 BC, when Caesar had close relationships with Arles that, according to the French archaeologist Luc Long, who found it in 2007 after struggling with poor visibility, strong currents and the catfishes of Rhone, the famous marble bust of Arles had been carved. This beautiful portrait, discovered in the depths of the right bank of the river near Arles, has been undoubtedly attributed by Long to Julius Caesar. Here we compare the Arles bust with some others and propose the application of image processing and multimodal biometric systems to the ancient artifact. ... More at SSRN

Dancing Men in Renaissance Painting May Be Native Americans

Dancing Men in Renaissance Painting May Be Native Americans
Friday, May 03, 2013
VATICAN CITY—While restoring a fresco painted in 1494 by Pinturicchio on the walls of the Vatican’s Borgia Apartments, Maria Pustka found small images of dancing men that may be the first Western depictions of Native Americans. “The Borgia Pope was interested in the New World, as were the great chancelleries of Europe. It is hard to believe that the papal court, especially under a Spanish pope, would have remained in the dark about what Columbus encountered,” wrote Antonio Paolucci, director of the Vatican Museums. That pope would eventually arbitrate the division of New World lands between Spain and Portugal.

Friday, May 3, 2013

A Year Without a Summer

The 'Year Without a Summer' AAAS
"In many parts of the country winter refuses to release its icy grip, and records are being broken for spring’s late arrival. Although we know that spring and summer will come eventually, we are still a far cry from rivaling the “Year Without a Summer.”  That year was 1816. It was near the end of the Little Ice Age, a period that began around 1350 AD. It was also in the middle of what became known as the Dalton Minimum, an unusual period of low solar activity named after English meteorologist John Dalton that lasted from 1790 to 1830...."

Tuesday, April 30, 2013

Caesar and Caesarion


Quello sguardo amaro: i volti di Cesare e Cesarione. Intervista a Paolo Moreno
24/01/2011 - UmbriaLeft, by Giovanni Corazzi
Giusto un anno fa, nella nostra Umbrialeft veniva pubblicato un articolo in cui si parlava di una grande mostra, iniziata allora da qualche settimana (ottobre 2009) nel centro francese di Arles (presso il Musée départemental Arles antique) e dedicata agli oggetti riemersi dal fiume Rodano (riva destra, all’altezza, appunto, della cittadina provenzale) nel corso di una ventennale campagna condotta dal Drassm, il dipartimento ministeriale francese delle ricerche archeologiche, subacquee e sottomarine, guidato da Luc Long. .. tra cui un bellissimo busto. .. il Long sin dall’inizio avesse proposto senza esitazioni il nome di Cesare per il busto riemerso. Tale attribuzione, sebbene confermata da studiosi di valore quali lo storico Christian Goudineau (un classico il suo saggio su Cesare e la Gallia) e l’esperto di iconografia cesariana Flemming Johansen (autore di un importante lavoro del 1967, revisionato vent’anni dopo, dedicato ai ritratti in marmo di Cesare), è stata inizialmente contestata da altri studiosi, che hanno pensato a un magistrato romano o a un notabile di Arles. Fin dall’annuncio della scoperta (maggio 2008) era intervenuto al dibattito uno dei più importanti archeologi italiani, Paolo Moreno, ... Il Moreno ha toccato la questione anche nel 2009, con l’interessante ed elegante volume Cleopatra Capitolina (Editinera), e lo scorso ottobre in una lezione tenuta a Torino in occasione del «FestivalStoria». I suoi interventi hanno fornito nuove indicazioni sul ritratto, inserendolo in un ampio contesto che abbraccia il tratto mediterraneo da Arles ad Alessandria e che parla di una famiglia tanto grande quanto sfortunata. Divengono, infatti, protagonisti anche la regina d’Egitto Cleopatra e il figlio da lei avuto con Cesare, Tolemeo XV Cesare, meglio noto come Cesarione. Questi, nato nel 47 a.C., venne associato al regno a soli tre anni per volontà della madre, che evidentemente nutriva per il piccolo grandi progetti. ... 




http://www.umbrialeft.it/approfondimenti/quello-sguardo-cos%C3%AC-amaro-volti-cesare-e-cesarione-intervista-paolo-mor

Saturday, March 30, 2013

Monte Viso

 "Monte Viso is the location of a neolithic jadeite quarry, at an elevation of 2000 to 2400 metres. Its productivity peaked around 5000 BC. The jadeite was used to make cult axes, which are found all over western Europe." From Wiki

Geheimnisvolle Kult-Beile: Statussymbole der Steinzeit, Von Almut Bick
Sie sind ein Mysterium, eines der größten Rätsel aus der Zeit der Jäger und Sammler: Steinklingen aus kostbarstem Jadeit. Wozu dienten diese Äxte, die Archäologen in halb Europa gefunden haben? Forscher sind dem Geheimnis nun dicht auf der Spur ...Über sechstausend Jahre ist es her, dass die steinzeitlichen Bergleute mit dem äußerst seltenen Jadeit heimkehrten. Hoch oben, jenseits der Schneegrenze des Monte Viso in den italienischen Alpen, betrieben sie einen regelrechten Steinbruch für das grüne Mineral. ...

http://www.spiegel.de/wissenschaft/mensch/geheimnisvolle-kult-beile-statussymbole-der-steinzeit-a-477917.html

See also:
Zwischen Atlantik und Schwarzem Meer , Die großen Beile aus alpinem Jadeit im 5. und 4.Jt. v. Chr
by Serge Cassen
http://www.academia.edu/1954923/Zwischen_Atlantik_und_Schwarzem_Meer_Die_grossen_Beile_aus_alpinem_Jadeit_im_5._und_4.Jt._v.Chr

Zu den Jadeit-Quellen am Monte Viso
by Rengert Elburg
http://www.academia.edu/3119319/Zu_den_Jadeit-Quellen_am_Monte_Viso

Wednesday, March 27, 2013

Liath Meisicith

From "The Mystery of Fire", by Mainly Palmer Hall, 
http://en.wikipedia.org/wiki/Manly_Palmer_Hall

The burning glass of Druids


Saturday, March 23, 2013

C/2011 L4 PANSTARRS

Comet C/2011 L4 PANSTARRS as seen from Mount Dale, Western Australia. Image credit: Astronomy Education Services/Gingin Observatory


Image obtained after processing with AstroFracTool the original at
http://www.nasa.gov/mission_pages/asteroids/news/comet20130307.html




Sunday, March 3, 2013

Air curtains for Terracotta Warriors

"New system can shield national relics from damage by pollution. Even the Terracotta Warriors are feeling the effects of China's choking air pollution. Chinese scientists have found that the indoor environment where the Terracotta Warriors are housed could cause them to deteriorate, prompting some scientists to raise the idea of using air curtain technology to help control the environment in the pits."
More at http://www.chinadaily.com.cn/cndy/2013-03/02/content_16268606.htm


Adapted from Wikipedia, courtesy Maros