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Hubble_s Views.jpgHubble's Views of the Universe113 visite"...Flectere si nequeo Superos, Acheronta movebo..."
(Virgilio)
"...Se non sarò capace di farmi ascoltare dagli Dei dell'Empireo, (allora) smuoverò quelli dell'Inferno..."
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Vega-PIA07217_modest.jpgImpact near Vega: the origin of a "dust ring" around the Star113 visiteCaption NASA originale:"This artist concept illustrates how a massive collision of objects perhaps as large as the planet Pluto smashed together to create the dust ring around the nearby star Vega. New observations from NASA's Spitzer Space Telescope indicate the collision took place within the last one million years. Astronomers think that embryonic planets smashed together, shattered into pieces and repeatedly crashed into other fragments to create ever finer debris.
In the image, a collision is seen between massive objects that measured up to 2.000 Km (about 1.200 miles) in diameter. Scientists say the big collision initiated subsequent collisions that created dust particles around the star that were a few microns in size. Vega's intense light blew these fine particles to larger distances from the star and also warmed them to emit heat radiation that can be detected by Spitzer's infrared detectors".
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Graph-PIA07337.jpgOTS 44: another "failed" star113 visiteThis graph of data from NASA's SST shows that an extraordinarily low-mass brown dwarf, or "failed star," is circled by a disc of planet-building dust. The brown dwarf, called OTS 44, is only 15 times the mass of Jupiter, making it the smallest known brown dwarf to host a planet-forming disc.
SST was able to see this unusual disc by measuring its infrared brightness. Whereas a brown dwarf without a disc (red dashed line) radiates infrared light at shorter wavelengths, a brown dwarf with a disc (orange line) gives off excess infrared light at longer wavelengths. This surplus light comes from the disc itself and is represented here as a yellow dotted line. Actual data points from observations of OTS 44 are indicated with orange dots. These data were all acquired by using SST's infrared array camera.
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ThreeSunsPIA03520.jpgA planet with 3 Suns...113 visiteHD 188553 Ab is a gas giant planet, about 1,14 times the mass of Jupiter, with an orbital period of 3,3 days discovered using the Keck I telescope atop Mauna Kea in Hawaii and zips around a single star that is orbited by a nearby pair of pirouetting stars. Because the stars in this triple system are bunched together, sunsets on the planet - or on any moons that might exist around the planet - would be spectacular. This rambunctious stellar family is called HD188753 and is located 149 LY away in the constellation of Cygnus.
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Beta Pictoris-2.jpgBeta Pictoris113 visite"...Roman Virgil, thou that singest
Ilion's lofty temples robed in fire,
Ilion falling, Rome arising,
Wars, and filial faith, and Dido's pyre..."
Alfred, Lord Tennyson (1809-1892) - "To Virgil" (1882)
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Abell-901_and_902_SC.jpgDark Matter Distribution in Supercluster Abell 901/902 (HST)113 visite"...Strive first for the Kingdom of God, and His righteousness, and all these things will be given to you as well..."
- Matthew 6:33MareKromium
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Exo-Planet-PIA13054.jpgExoplanet GJ 436b113 visiteAn unusual, Methane-free World is partially eclipsed by its Parent Star in this artist's concept. NASA's Spitzer Space Telescope has found evidence that a hot, Neptune-sized planet orbiting a star beyond our Sun lacks Methane -- an ingredient common to many planets in our own Solar System.
Models of Planetary Atmospheres indicate that any world with the common mix of Hydrogen, Carbon and Oxygen, and a temperature up to 1000 Kelvin (1340 degrees Fahrenheit) should have a large amount of Methane and a small amount of Carbon Monoxide.
The Planet illustrated here, called GJ 436b, is about 800 Kelvin (or 980 degrees Fahrenheit) -- it was expected to have Methane but Spitzer's observations showed it does not. The finding demonstrates the diversity of exoplanets, and indicates that the commonly accepted models of Exoplanetary Atmospheres need to be revised.MareKromium
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Gravitational_Lensing.gifGravitational Lensing113 visiteLensing by a Black Hole. This is an animated simulation of a phenomenon known as "Gravitational Lensing" and as caused by a Schwarzschild-type Black Hole moving in front of a background Galaxy. A secondary image of the Galaxy can be seen within the so-called "Einstein's Ring" of the Black Hole, on the opposite direction of the one of the Galaxy. The secondary image grows (still remaining within the Einstein's Ring) as the primary image approaches the Black Hole. The surface brightness of the two images remain constant, but their angular size varies, hence producing an amplification of the Galaxy Luminosity as seen from a distant observer. The maximum amplification occurs when the background Galaxy (or, like in the present case, a bright part of it) is exactly behind the Black Hole.MareKromium
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1 - Milky Way - SST-1.jpgThe Milky Way (infrared vision - SST) - 1112 visite"...La Scienza ha sue Regole, ci dicono, e vanno rispettate se si vuol essere scienziati: d’accordo. Ma sono le Regole della Scienza o piuttosto le regole di chi decide come fare Scienza?
È la realtà a stabilire le modalità per la sua conoscenza o non sono piuttosto dogmi imposti da chi si è fatto il nido su una cattedra universitaria?..."
Paolo Cortesi
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2-Milky Way - SST.jpgThe center of the Milky Way: what's behind the dust!112 visite"...Delere licebit quod non edideris; (sed) nescit vox missa reverti..."
(Orazio)
"...Si può cancellare tutto ciò che rimane inespresso; ma una volta che si è parlato, nulla di quanto detto potrà mai essere restituito al silenzio..."
("...Voce dal sen fuggita - Più richiamar non vale; - Non si rattien lo strale - Quando dall'arco uscì..." - Metastasio)
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IC-1396-2.jpgIC 1396 - Emission Nebula (HST)111 visite"...Se io, che sono il Professore, interpreto una regola, ancorchè in modo sbagliato, comunque esprimo una Teoria. Ma se Voi, che siete i Discepoli, interpretate quella medesima regola allo stesso modo in cui l'ho interpretata io (e cioè in maniera errata), allora dite una stupidaggine. Mi sono spiegato?!?..."
Citazione da un Ch.mo Professore dell'Università Cattolica del Sacro Cuore di Milano (Facoltà di Giurisprudenza - A.D. 1983)
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BH-Black-Hole.jpgComputer simulation of a Black-Hole from start to finish111 visitePlasma is falling slowly toward the black hole in a (at the upper left). The plasma has a magnetic field, shown by the white lines. It picks up speed as it falls toward the hole in b (at the upper right), c (lower left) and d (lower right). However, the rotating black hole twists up space itself (and the magnetic field lines) and ejects electromagnetic power along the north and south poles above the black hole. The red and white color shows the immense electromagnetic power output, which eventually will pick up particles and form squirting jets.
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