Welcome!

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

Wednesday, December 14, 2016

La guerra di Caligola contro Poseidone

La guerra di Caligola contro Poseidone

Questo link vi porta alla discussione di un meme motivatore, su curioso aneddoto di Gaio Giulio Cesare Augusto Germanico, il terzo imperatore romano passato alla storia col nomignolo di Caligola.
"Ogni volta che fai qualcosa di stupido, ricorda che l’Imperatore Caligola intraprese una guerra contro Poseidone (Dio del mare) e ordinò ai suoi uomini di sferrare coltellate all’acqua e scagliare lance in mare così a caso."
"Sfortunatamente, - dice il sito - stiamo parlando in questo caso dell’equivalente storico di una leggenda urbana. Tutto quel che sappiamo degli imperatori è frutto ciò che ci è stato tramandato dai membri della classe senatoria, i quali erano ostili a chiunque volesse incentrare tutti i poteri su di sé. "
In questo caso è Svetonio, Caligola, Liber IV.46.  "L’evento ricalca un topos letterario nella narrazione delle guerre persiane: la flagellazione dell’Ellesponto. Durante la seconda spedizione, Serse I di Persia volle costruire un ponte di barche per superare un tratto di mare piuttosto profondo dell’antico Stretto dei Dardanelli. Il ponte fu distrutto dalla violenza del mare quando i lavori erano ormai quasi giunti al termine. Serse decapitò i responsabili della costruzione e ordinò di flagellare l’Ellesponto, colpevole di avergli arrecato un’offesa personale."

Friday, December 9, 2016

Images - Mars Science Laboratory

Images - Mars Science Laboratory

Alveolar Stones on Mars



Curiosity - Sol 1403


Adjusted

Green stone of Mars


Curiosity Sol 1505

Curiosity Rover Finds and Examines a Meteorite on Mars

Alveoli in the stone - Mars

Here magnificent alveoli in the stone on MARS. Curiosity Sol 1523


Note the bright lines which are segmenting the stone!
Wonderful.

http://mars.jpl.nasa.gov/msl/multimedia/raw/?rawid=1523MH0003690000600330R00_DXXX&s=1523.76560068931

Again, we have a sort of honeycomb weathering. "Honeycomb weathering, also known as fretting, cavernous weathering, alveoli/alveolar weathering, stone lattice, stone lace or miniature tafoni weathering (Mustoe, 1982) is a form of salt weathering common on coastal and semi-arid granites, sandstones and limestones (Mustoe 1982)." https://en.wikipedia.org/wiki/Honeycomb_weathering



Martian Curiosity


"Martian Wood"

Of course, this is not wood. This formation is interesting because it looks like a sort of  honeycomb weathering.  "Honeycomb weathering, also known as fretting, cavernous weathering, alveoli/alveolar weathering, stone lattice, stone lace or miniature tafoni weathering (Mustoe, 1982) is a form of salt weathering common on coastal and semi-arid granites, sandstones and limestones (Mustoe 1982)."  https://en.wikipedia.org/wiki/Honeycomb_weathering

Curiosity Sol 1523



Martian Curiosity

Curiosity Sol 1537.




"Snake"

This is a very interesting rock formation. When the image is enhanced,  the colours make it looking like a "snake". 

We can see a stone of the same kind in other images of Curiosity - Sol 1514






Monday, November 21, 2016

Fantastic Research and Where to Find It

Fantastic Research and Where to Find It


Very interesting on SSRN BLOG


If we haven’t already sent you running to do a QuickSearch for “Harry Potter” in the eLibrary then perhaps we can interest you with some choice titles we found there. Without further ado:
Our Favorite Harry Potter Themed Titles Available on SSRN
millennials-6

Saturday, September 10, 2016

Ales Stenar and the Moon

The Ales Stenar, known in English as the Ale’s Stones, is an ancient megalithic monument of Sweden. The stones are outlining a ship. The paper
"Astronomical Alignments of Ales Stenar Along Sunset and Moonset Directions"
shows alignments of the stones along the northern possible moonset on major and minor lunar standstills. These astronomical alignments are shown using the Photographer’s Ephemeris. It is possible that this megalithic monument was used for observing the cycles of the moon.

In this image, we can see the left side of the Ales Stenar and the direction of the northern moonset (blue line) on a major lunar standstill, represented by the blue line. Note the alignment of the stones along this direction.

Here, we can see the right side of the Ales Stenar and the direction of the northern moonset (blue line) on a minor lunar standstill, represented by the blue line. Note the alignment of the stones along this direction.

The images are snapshots of the results of Photographer's Ephemeris. In the images, the yellow and orange lines are giving the directions of sunrise and sunset on the days of lunar standstills.

On the summer solstice, we have the main axis of Ales Stenar oriented along the sunset. In the following image, this direction is given by the orange line.