| Piú votate |
OPP-SOL101.jpgMartian Twilights... (natural colors; credits: Dr Gianluigi Barca)59 visitenessun commentoMareKromium
(11 voti)
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OPP-SOL710-1N191206495EDN64KSP1585L0M1.jpgGood-morning Star-shine! - Sol 710 (True Colors; credits: Lunexit)74 visitenessun commentoMareKromium
(11 voti)
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Asteroids-Asteroid_2002JF56-PIA09230-01.jpgFormer "Unknown Asteroid" is now "Asteroid 2002 JF56"62 visiteThe two "spots" in this image are a composite of two images of asteroid 2002 JF56 taken on June 11 and June 12, 2006, with the Multispectral Visible Imaging Camera (MVIC) component of the New Horizons Ralph imager. In the bottom image, taken when the asteroid was about 3,36 MKM (approx. 2,1 MMs) away from the Spacecraft, 2002 JF56 appears like a dim star. At top, taken at a distance of about 1,34 MKM (such as about 833.000 miles), the object is more than a factor of six brighter.
The best current, estimated diameter of the asteroid is approx. 2,5 Km.
The asteroid observation was a chance for the New Horizons team to test the spacecraft's ability to track a rapidly moving object. On June 13 New Horizons came to within about 102.000 Km of the small asteroid, when the Spacecraft was nearly 368 MKM (about 228 MMs) from the Sun and about 273 MKM (approx 170 MMs) from Earth.MareKromium
(11 voti)
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M-045-000.jpgM 45 - The "Pleiades" Star-Cluster64 visite"...Possunt, quia posse videntur..."
(Virgilio)
"...Possono perchè credono (sono convinti) di potere..."MareKromium
(11 voti)
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OPP-SOL1357-1N248668443EFF8788P1593R0M1.jpgImage-artifact or U.F.O.? - Sol 135778 visitenessun commentoMareKromium
(11 voti)
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Aurora_Borealis-2.jpgAurora Borealis over Juneau61 visiteCaption NASA:"Some auroras can only be seen with a camera. They are called sub-visual and are too faint to be seen with the unaided eye. The reason is that the human eye only accumulates light for a fraction of a second at a time, while a camera shutter can be left open indefinitely. When photographing an already picturesque scene above Juneau, Alaska, USA, a camera caught green sub-visual aurora near the horizon. Auroras are sparked by energetic particles from the Sun impacting the magnetic environment around the Earth. Resultant energetic particles such as electrons and protons rain down near the Earth's poles and impact the air.
The impacted air molecules temporarily lose electrons, and when oxygen molecules among them reacquire these electrons, they emit green light. Auroras are known to have many shapes and colors". MareKromium
(11 voti)
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CometHolmes-UZ~0.gifForest and Sky58 visitenessun commentoMareKromium
(11 voti)
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CosmicRays.jpgCosmic Rays62 visiteWhere do Cosmic Rays come from? A major step toward answering this century old question may have just come in from the Auger Observatory Project, the world's premier Cosmic Ray Observatory. That high energy fundamental particles are barreling through the Universe has been known for about a century.
Because ultra high energy cosmic rays are so rare and because their extrapolated directions are so imprecise, no progenitor objects have ever been unambiguously implied. New results from Auger, however, indicate that 12 of 15 ultra high energy cosmic rays have sky directions statistically consistent with the positions of nearby active galactic nuclei. These galactic centers are already known to emit great amounts of light and are likely powered by large Black Holes. The Auger results also indicate that the highest energy cosmic rays are protons, since the electric charge of higher energy nuclei would force the Milky Way Galaxy's magnetic field to deflect and effectively erase progenitor source direction. MareKromium
(11 voti)
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SOL1366-2P247638865EFFAWCCP2414L7M1.jpgPanorama - Sol 1366 (2 - true colors; elab. Lunexit)59 visitenessun commentoMareKromium
(11 voti)
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Comets-Comet_Holmes-UW.jpgComet 17-P-Holmes is getting Bigger!67 visiteCaption NASA, da "NASA - Picture of the Day", del 5 Novembre 2007:"Comet Holmes continues to be an impressive sight to the unaided eye. The comet has diminished in brightness only slightly, and now clearly appears to have a larger angular extent than stars and planets.
Astrophotographers have also noted a distinctly green appearance to the comet's coma over the past week.
Pictured above over Spain in 3 digitally combined exposures, Comet 17P/Holmes now clearly sports a tail. The blue ion tail is created by the solar wind impacting ions in the coma of Comet Holmes and pushing them away from the Sun. Comet Holmes underwent an unexpected and dramatic increase in brightness starting only two weeks ago. The detail visible in Comet Holmes' tail indicates that the explosion of dust and gas that created this dramatic brightness increase is in an ongoing and complex event.
Comet Holmes will move only slightly on the sky over the next month (such as December 2007)".MareKromium
(11 voti)
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M-008-91.jpgM 8, M 20 and NGC 655999 visite"...Et lacrimae prosunt, lacrimis adamanta movebis..."
(Ovidio)
"...Anche le lacrime giovano, (poichè) con esse puoi smuovere pure i macigni..."MareKromium
(11 voti)
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NGC-3372.jpgNGC 3372 - The "Carina Nebula"60 visite"...See, the whole land is before you: go wherever you think it is good and right to go..."
- Jeremiah, 40:4MareKromium
(11 voti)
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