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Titan-Huygens Lens.jpgThe Discovery of Titan71 visiteIl 25 Marzo 1655 l'Astronomo Olandese Christiaan Huygens scopriva "Luna Saturni" - ossìa Titano. In questo frame vediamo tutto ciò che resta del telescopio che egli usò (nota: telescopio concepito e costruito in collaborazione con suo fratello, Constantijn Huygens): la lente. Essa ha un diametro di 57 mm e reca sul bordo la dicitura "X 3 FEBR. MDCLV": si tratta della lunghezza focale e della data di completamento del lavoro (e cioè la "lucidatura" della lente stessa): il 3 February 1655.
Si leggono altresì (in alto) questi versi di Ovidio, "Admovere Oculis Distantia Sidera Nostris". Un pizzico di romanticismo? No, solo la porzione di un anagramma: un semplice gioco enigmistico (molto comune ai suoi tempi) che riportava alcuni dettagli della sua scoperta (data inclusa). Decodificato e tradotto l'anagramma di Huygens recita "Una luna orbita intorno a Saturno in 16 giorni e 4 ore". Oggi sappiamo che il periodo orbitale di Titano è pari a poco meno di 16 giorni. Titano ha rallentato o Huygens sbagliò i conti?
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Moon and Companions~2.jpgHappy New Year from the Moon and Venus71 visiteDa "NASA - Picture of the Day" del 4 Gennaio 2006:"Fading sunlight, a young crescent Moon, and brilliant Venus shared the Western Sky in this view of 2005's final sunset from the top of Mount Haleakala, on Maui, Hawaii. Also known as the Sacred House of the Sun, Haleakala, is Maui's dormant volcano.
At 10.000 feet, the Summit is an ideal site for astronomical observatories, and this scene also features the silhouette of the Northern Hemisphere Faulkes Telescope. It can be of particular interest to students the fact that the Faulkes Telescope (a 2-meter diameter instrument, dedicated to astronomy education), can be remotely operated over the internet.
The Project is a joint effort between the Dill Faulkes Educational Trust and the University of Hawaii - Institute for Astronomy (...)".
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Tomorrow.jpgTomorrow never dies...71 visitenessun commento
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Memory.jpgIn Memory of Arthur C. Clarke71 visiteUn occhio che scruta le azioni e le intenzioni, freddo e luminoso, ancora si accende - minaccioso - nell'Immaginario Collettivo, quando si parla di AI.
L'occhio è quello dell'Elaboratore HAL-9000: una creazione (forse la più fantastica e realistica) del Grande Scrittore Inglese, Sir Arthur C. Clarke, deceduto oggi (19 Marzo 2008).
Questa immagine vuole essere un Tributo al Suo Genio, alla Sua Opera, a nostro parere, più Bella ("2001: A Space Odyssey") ed alla Sua Memoria.
Lo STAFF di Lunar Explorer ItaliaMareKromium
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Ice-5.JPGIcy Corals... (by Dr M. Faccin)71 visitenessun commentoMareKromium
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MOON OVER VIENNA.jpgSolar eclypse over Vienna70 visiteUn'immagine bellissima: non servono altri commenti.
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ALANBEAN-LUNARROVER.jpgLunar "Grand Prix"70 visiteApollo 16 Commander John Young is putting the Lunar Rover through a full test. This was the second mission with the Rover onboard and this Lunar Grand Prix would allow John to evaluate the performance of the Rover in the light gravity and the dusty, cratered, and rocky surface of the Moon.
His companion, Charlie Duke, is photographing it all with the 16-mm Data Acquisition Camera normally mounted on the Rover, but hand-held temporarily to document the Rover motion.
John later said:"The tendency was to drive wide open or very close to that and take what you got. The best reference to speed control was the speedometer, as I really didn't have a feel for the difference between 7 and 10 Km per hour."
Later, he demonstrated a sharp turn at ax speed, about 10 Km per hour. I made the Rover end break out to show the engineers how it looked.
It is no problem as all I had to do was cut back like I do when driving in snow...I didn't get up to any great speed, maybe 10 clicks at the most, but the terrain around there was too rough and rocky for that kind of foolishness..."
Charlie, who was filming it all, told Houston, "...man, Indy has never seen a driver like this."
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Venus~0.jpgNight-flight to Venus (by Roberto Tremolada)70 visitenessun commentoMareKromium
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Moon and Pleiades.jpgOld Moon...69 visiteDa "NASA - Picture of the Day" del 29 Giugno 2006:"An old crescent Moon shares the Eastern Sky over Menton, France, with the Sister Stars of the Pleiades cluster in this early morning skyscape recorded just last Friday, June 23rd. (Bright Venus was also near the Eastern horizon, but is not pictured here.) Astronomical images of the well-known Pleiades often show the cluster's alluring blue reflection nebulae, but they are washed out here by the bright moonlight. Still, while the crescent Moon is overexposed, surface features can be seen on the dim lunar night side illuminated by earthshine - light from sunlit planet Earth. Of course, you can spot a young crescent Moon in the early evening sky tonight.
Having left the Pleiades behind, a lovely lunar crescent now appears in the West, lining up with planets Mars, Saturn and Mercury along the Solar System's Ecliptic Plane".
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In The Sunset.jpgRed, red Sunset...69 visitenessun commento
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SettingSun.jpgA Day of the Sun69 visite"...Peace I leave with you; my Peace I give to you..."
- John 14:27
nota: "A Day of the Sun" è anche il titolo di una serie di opere dedicate al Sole, realizzate dal Pittore Tetsuro Sawada.
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Over Titan_s Clouds.jpgOver-clouds69 visitenessun commento
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