| |
| Risultati della ricerca nelle immagini - "Images" |
0-The Milky Way.jpgLooking at the center of the Milky Way188 visiteGalileo, non c'è più nulla,
Al di là del Cielo...
Gli Spazi Sconfinati che hai sognato,
E i Mondi senza Tempo che hai guardato,
Son solo isole, frammenti di uno specchio infranto...
Son solo lacrime, scintille di un eterno pianto...
E non c'è nulla che ti aspetta, Galileo,
No, non ti stancare...
E non c'è niente da scoprire, Galileo,
Al di là del Mare...
Galileo, non c'è più niente,
Al di là del Sole...
I moti irrazionali del tuo Cuore,
Le favole del tuo più grande Amore,
Son solo linee, tratteggi di un disegno bianco...
Son solo suoni, di un ritmo già battuto e stanco...
E non c'è nulla che ti aspetta, Galileo,
Non ci pensare...
E non c'è niente da scoprire, Galileo,
Al di là del Mare...
Galileo, non c'è che Dio, un Dio,
Al di là di Giove..
La Luce che rischiara questi monti,
E l'alba che rinnova gli orizzonti,
Son solo Istanti, del Tempo che trascorre irripetibile...
Son solo Amanti, di un sogno che rimane irraggiungibile...
Ma non c'è nulla che ti aspetta, Galileo,
Non ti crucciare,
Non c'è più niente da scoprire, Galileo,
Al di là del Mare...
P.C. Floegers - "Poesie"
|
|
00-Aristarchus Crater-2005-29-a-full_jpg.jpg01 - Aristarchus Crater (and Plateau)109 visiteThe HST Advanced Camera for Surveys snapped this close-up view of the Aristarchus crater on Aug. 21, 2005. The crater is 26 miles (about 42 Km) in diameter and approx. 2 miles (such as about 3,2 Km) in depth and sits at the South-Western edge of the Aristarchus Plateau. The Plateau is well known for its rich array of geologic features, including a dense concentration of volcanic rilles (such as river and valley-like landforms that resulted from the collapse of lava tubes) and source vents.
|
|
00-The Moon from HST.jpg00 - The Moon through the "Eyes" of the Hubble Space Telescope104 visite
|
|
000-The_Sun_from_Space.JPGThe Sun from all the Planets of the Solar System142 visiteCome appare (o meglio: "Quanto grande" dovrebbe apparire) il Disco Solare allorchè osservato da un Mondo diverso dalla Terra?
Senza pretesa di assolutezza matematica, questa Tavola dovrebbe fornirVi un'idea più precisa della questione su cui tanto ci siamo arrovellati sino ad ora.
Nota: i diversi diametri sono stati ipotizzati ragionando in termini di UA (Unità Astronomiche), laddove 1 UA = distanza Sole / Terra = 149.597.970 Km
ergo la distanza fra il Sole e Mercurio viene fatta mediamente pari a (circa *) 0,4 UA
fra il Sole e Venere è mediamente pari a (circa) 0,7 UA
fra il Sole e Marte è mediamente pari a (circa) 1,5 UA
fra il Sole e Giove è mediamente pari a (circa) 5,2 UA
fra il Sole e Saturno è mediamente pari a (circa) 9,5 UA
fra il Sole ed Urano è mediamente pari a (circa) 19,6 UA
fra il Sole e Nettuno è mediamente pari a (circa) 30 UA
fra il Sole ed il Sistema Binario Plutone-Caronte è mediamente pari a (circa) 39 UA
* diciamo circa perchè le orbite dei diversi Pianeti attorno al Sole NON descrivono cerchi perfetti (e quindi con raggio - distanza dal Sole - fisso), bensì delle ellissi più o meno allungate (le quali implicano l'esistenza di un "perielio" - o punto di massima vicinanza del Corpo Celeste considerato rispetto al Sole - ed un "afelio" - o punto di massima lontananza del Corpo Celeste considerato rispetto al Sole.MareKromium
|
|
001-Ceres-alone.jpg1-Ceres from Hubble Space Telescope59 visiteNASA's Hubble Space Telescope took these images of the asteroid 1 Ceres over a 2-hour and 20-minute span, the time it takes the Texas-sized object to complete one quarter of a rotation. One day on Ceres lasts 9 hours.
Hubble snapped 267 images of Ceres as it watched the asteroid make more than one rotation. By observing the asteroid during a full rotation, astronomers confirmed that Ceres has a nearly round body like Earth's. Ceres' shape suggests that its interior is layered like those of terrestrial planets such as Earth. Ceres may have a rocky inner core, an icy mantle, and a thim, dusty, outer crust.
The "Bright Spot" that we see is a mistery: it is (obviously) brighter than its surroundings, but it is still very dark (very low albedo) reflecting only a small portion of Sunlight.
|
|
002-Aristarchus-detailmgnf-2005-29-l-full_jpg.jpg02 - Aristarchus Crater (detail mgnf)114 visiteAristarchus is also one of the "youngest" craters of the Moon: in fact it probably formed between 100 and 900 MY ago only (!).
|
|
004-Ceres.jpgMoments of 1-Ceres (1)54 visiteDa "NASA - Picture of the Day", del 21 Agosto 2006:"Is 1-Ceres an Asteroid or a Planet?
Although a trivial designation to some, the recent suggestion by the Planet Definition Committee of the International Astronomical Union would have 1-Ceres reclassified from Asteroid to Planet.
A change in taxonomy might lead to more notoriety for the frequently overlooked world. Ceres, at about 1000 Km across, is the largest object in the main Asteroid Belt between Mars and Jupiter. Under the newly proposed criteria, Ceres would qualify as a planet because it is nearly spherical and sufficiently distant from other planets. Pictured above is the best picture yet of Ceres, taken by the Hubble Space Telescope as part of a series of exposures ending in 2004 January. Currently, NASA's Dawn mission is scheduled to launch in 2007 June to explore Ceres and Vesta, regardless of their future designations".
|
|
005-Ceres.jpgMoments of 1-Ceres (2)54 visiteFor 2 centuries it was the largest known rock in the Solar System. The Texas-sized asteroid Ceres, about 930 Km (about 580 miles) across, was the first asteroid ever detected. The space rock was identified in 1801 by astronomer Giuseppe Piazzi, a monk in Sicily and the founding director of the Palermo Astronomical Observatory. He noted over a few nights a shifting point in the sky that wasn't one of the planets, their moons or a star. Thus, he discovered the rock.
After discovering the asteroid, Piazzi was invited to join the Celestial Police, a group of 24 international astronomers looking for what they called "guest planets" between Mars and Jupiter. The Celestial Police noted that the spacing between planets was fairly regular, but that there was a large gap between Mars and Jupiter.
Soon other small bodies were discovered in that region (Pallas in 1802, Juno in 1804 and Vesta in 1807), so the Celestial Police concluded that not just one, but many minor planets had to exist in a Main Asteroid Belt.
|
|
006-Ceres.jpg1-Ceres (natural colors, from HST - credits: NASA/ESA et al.)54 visiteThe Hubble image of Ceres on the reveals bright and dark regions on the asteroid's surface that could be topographic features, such as craters, and/or areas containing different surface material. Large impacts may have caused some of these features and potentially added new material to the landscape. The Texas-sized asteroid holds about 30 to 40% of the mass in the Asteroid Belt.
Ceres' round shape suggests that its interior is layered like those of terrestrial planets such as Earth. The asteroid may have a rocky inner core, an icy mantle, and a thin, dusty outer crust. The asteroid may even have water locked beneath its surface. It is approx. 590 miles (950 Km) across and was the first asteroid discovered in 1801.
The observation was made in visible and ultraviolet light between December 2003 and January 2004 with the HST Advanced Camera for Surveys. The color variations in the image show either a difference in texture or composition on Ceres' surface.
Astronomers need the close-up views of the Dawn spacecraft to determine the characteristics of these regional differences.
MareKromium
|
|
015-Ceres_and_Vesta.jpg4-Vesta and 1-Ceres from HST (natural colors)54 visiteThese Hubble Space Telescope images of Vesta and 1-Ceres show two of the most massive asteroids in the Asteroid Belt, a Region between Mars and Jupiter.
The images are helping astronomers plan for the Dawn spacecraft’s tour of these hefty asteroids. On July 7, 2007, NASA is scheduled to launch the spacecraft on a 4-year journey to the Asteroid Belt. Once there, Dawn will do some asteroid-hopping, going into orbit around Vesta in 2011 and Ceres in 2015. Dawn will be the first spacecraft to orbit two targets. At least 100.000 asteroids inhabit the Asteroid Belt, a reservoir of leftover material from the formation of our Solar-System planets some 4,6 Billion Years (BY) ago.MareKromium
|
|
018-Vesta-6-PIA13428.jpgSome of the "Faces" of 4-Vesta, from Hubble Space Telescope96 visiteNASA's Hubble Space Telescope snapped these images of the Asteroid 4-Vesta in preparation for the Dawn Spacecraft's visit in 2011. Each of the 4 Hubble images captures views of Vesta during its 5,34-hour rotation period. Hubble's sharp "eye" can see features as small as about 40 Km (24,84 miles) across in these images. Vesta was 211 MKM (approx. 131 MMs) from Earth when Hubble made the observations.
The images show the difference in brightness and color on the Asteroid's Surface. These characteristics hint at the large-scale features that the Dawn Spacecraft will see when it visits the potato-shaped asteroid.
Astronomers used the images, taken with Hubble's Wide Field Camera 3, to better determine 4-Vesta's Spin Axis. Based on the HST observations, astronomers calculated a slightly different, and more precise, Rotation Axis for Vesta. The new calculation will change the pattern of sunlight expected to illuminate the Asteroid when Dawn arrives.
Determining a more accurate Spin Axis for 4-Vesta will also help scientists refine the Dawn Spacecraft's orbit around the Asteroid. Dawn will orbit the rocky object for a year, beginning in July 2011. The Spacecraft will then travel to the "Dwarf Planet" 1-Ceres, arriving in 2015.
Hubble has kept its "eye" on 4-Vesta for more than 15 years, beginning in 1994. Hubble images of 4-Vesta in 1997 helped astronomers discover the Asteroid's very large Impact crater. Astronomers combined views of 4-Vesta in Near-UltraViolet and blue light to construct these images and the images were taken on Feb. 25, 2010.MareKromium
|
|
019-Vesta-5-PIA13427.jpg4-Vesta from Hubble Space Telescope103 visiteThe Asteroid 4-Vesta is somewhat like our Moon, with ancient Lava Beds (the dark patches) and powdery Debris (or Regolith), such as the pulverized remains of impacts (the orange-colored areas). A flattened area on one end of 4-Vesta is a giant Impact Crater formed by a collision that perhaps occurred billions of years ago.
The crater is approx. 460 Km (285,66 miles) across, which makes it close to 4-Vesta's roughly 530-Km (329,13-mile) diameter. The asteroid is about the size of Arizona.
4-Vesta is one of the largest of a reservoir of about 100.000 Asteroids, the leftover material from the formation of our Solar System.
Astronomers combined images of Vesta in Near-UltraViolet and blue light to make this picture movie. The Hubble observations were made on Feb. 25 and Feb. 28, 2010.MareKromium
|
|
| 1240 immagini su 104 pagina(e) |
1 |
 |
|
|
|
|
|
|
|
|
|
|
|
