| Ultimi arrivi - The Universe Inside |
MeteorMilkyway_rowell.jpgTemporary Sky83 visitenessun commentoMareKromiumMag 02, 2009
|
|
Minds-MF.jpgA Beautiful Mind (by Marco Faccin)81 visitenessun commentoMareKromiumApr 29, 2009
|
|
Terra_03.jpgTerra! (additional process. by Giorgio Picciau)97 visitenessun commentoMareKromiumApr 23, 2009
|
|
Terra_04.jpgTerra! (additional process. by Giorgio Picciau)84 visitenessun commentoMareKromiumApr 23, 2009
|
|
Sands-20070801_Spirit-1.jpgWorking in the Sand...86 visitenessun commentoMareKromiumApr 23, 2009
|
|
LongAgo.gifAccording to Lagrange...88 visitenessun commentoMareKromiumApr 22, 2009
|
|
OldAgeAstronomy.jpgMedieval Astronomy from the "Melk Abbey"85 visiteDa "NASA - Picture of the Day" del giorno 17 Aprile 2009:"Discovered by accident, this manuscript page provides graphical insight to astronomy in medieval times, before the Renaissance and the influence of Nicolaus Copernicus, Tycho de Brahe, Johannes Kepler, and Galileo.
The intriguing page is from the lecture notes on astronomy compiled by the monk Magister Wolfgang de Styria before the year 1490 at Melk Abbey in Austria.
The top panels clearly illustrate the necessary geometry for a lunar (left) and solar eclipse in the Earth-centered Ptolemaic system.
At lower left is a diagram of the Ptolemaic view of the solar system and at the lower right is a chart to calculate the date of Easter Sunday in the Julian calendar.
Text at the upper right explains the movement of the planets according to the Ptolemaic system.
The actual manuscript page is on view at historic Melk Abbey as part of a special exhibition during the International Year of Astronomy".MareKromiumApr 17, 2009
|
|
HighwaysToForever090306_6229-32.jpgHighways to Forever99 visitenessun commentoMareKromiumApr 14, 2009
|
|
Walhalla-070912_8930-39.jpgWalhalla85 visitenessun commentoMareKromiumApr 14, 2009
|
|
Venus.jpgDaytime Venus75 visiteDa "NASA - Picture of the Day" del giorno 9 Aprile 2009:"This remarkable picture of a slender crescent Venus was made during daylight hours on March 26, 2009.
Venus was then very near Inferior Conjunction, its closest approach to a point on a line directly between Earth and the Sun. So, daylight was a good time to carefully record the telescopic view when both Venus and Sun were high in the daytime sky.
Near Inferior Conjunction, Venus is closest to us and at its largest apparent size, but Venus is also strongly backlit by Sunlight, presenting its night side partially outlined by a narrow crescent.
What makes the image remarkable are the faint arcs extending beyond the sunlit crescent around to the night side of Venus, due to sunlight filtering through the Planet's dense Atmosphere.
Astronomer Eddie Guscott reports from his site in Essex, England, that the faint extensions came and went as the Earth's atmospheric blurring changed. His image was constructed from 85 of the sharpest frames chosen from thousands taken with a webcam and telescope".MareKromiumApr 09, 2009
|
|
WarmPlanetColdStar-PIA11980.jpgWarm Planet, Cold Star83 visiteThis artist's conception shows a young, hypothetical planet around a cool star. A soupy mix of potentially life-forming chemicals can be seen pooling around the base of the jagged rocks. Observations from NASA's Spitzer Space Telescope hint that planets around cool stars the so-called M-dwarfs and Brown dwarfs that are widespread throughout our Galaxy might possess a different mix of life-forming, or prebiotic, chemicals than our young Earth.
Life on our Planet is thought to have arisen out of a pond-scum-like mix of chemicals. Some of these chemicals are thought to have come from a planet-forming disk of gas and dust that swirled around our young Sun. Meteorites carrying the chemicals might have crash-landed on Earth.
Astronomers don't know if these same life-generating processes are taking place around stars that are cooler than our Sun, but the Spitzer observations show their disk chemistry is different. Spitzer detected a prebiotic molecule, called Hydrogen Cyanide (Cianuro di Idrogeno), in the disks around yellow stars like our Sun, but found none around cooler, less massive, reddish stars. Hydrogen Cyanide is a carbon-containing, or organic compound. Five Hydrogen Cyanide molecules can join up to make Adenine a chemical element of the DNA molecule found in all living organisms on Earth.MareKromiumApr 08, 2009
|
|
Proximity.jpgProximity (by Roberto Tremolada)74 visitenessun commentoMareKromiumApr 05, 2009
|
|
| 496 immagini su 42 pagina(e) |
 |
|
|
|
|
18 | |
|
|
|
|
