| Piú viste - The Universe Inside |
Proximity.jpgProximity (by Roberto Tremolada)74 visitenessun commentoMareKromium
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Venus.jpgDaytime Venus74 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".MareKromium
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UnevenPassion.jpgThe "Uneven Passion" (by Marco Faccin)74 visitenessun commentoMareKromium
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The_Beautiful_Martian_Paving.jpgThe Beautiful "Martian Paving" (by Dr M. Faccin & Lunexit)74 visitenessun commentoMareKromium
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Zodiacal_beletsky_big.jpgZodiacal Light and the False Dawn73 visite"...Do not pronounce judgment before the time, before the Lord comes, who will bring to light the things now hidden in darkness and will disclose the purposes of the heart..."
- 1 Corinthians 4:5MareKromium
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The_Galxy_Survey.gifLooking Southward...73 visite"...Do not fling away your fearless confidence for it carries a great and glorious compensation of reward.
You have need of steadfast patience and endurance, ...enjoy to the full what is promised..."
(Heb. 10:35-36)MareKromium
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Aurora_Borealis-2.jpgAurora Borealis over Juneau73 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
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ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-Where-mer_2008258_lrg.jpgWhere is this Place?!?73 visiteUn altro (speriamo simpatico...) Space-Quiz per i nostri Lettori: secondo Voi, a quale Regione di Marte si riferisce questa (spettacolare) ripresa?MareKromium
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Moon_Halo.jpgSpanish Moon73 visitenessun commentoMareKromium
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Triple_Sunrise.jpgTriple Sunrise73 visiteDa "NASA - Picture of the Day" del giorno 4 Agosto 2009:"How can the same Sun rise three times? Last month on Friday, 2009 July 10, a spectacular triple sunrise was photographed at about 4:30 am over Gdansk Bay in Gdansk, Poland. Clearly, our Sun rises only once. Some optical effect is creating at least two mirages of the Sun -- but which effect? In the vast majority of similarly reported cases, mirages of the brightest object in the frame can be traced to reflections internal to the camera taking the images. Still, the above image is intriguing because a sincere photographer claims the effect was visible to the unaided eye, and because the photographer took several other frames that show variants of the same effect. Therefore, polite readers are invited to debate whether the above image captures a particularly spectacular example of common reflections inside a standard digital camera, shows one of the most spectacular examples of atmospheric lensing yet recorded, or was caused by something completely different. If the discussion converges, the consensus will be posted here at a later date".MareKromium
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TheGreyIllusion.JPGThe "Same Color Illusion"73 visiteDa "NASA - Picture of the Day" del giorno 4 Ottobre 2009:"Are square A and B of the same color?
They are.
The above illusion, called the "Same Color Illusion", illustrates that purely human observations in science may be ambiguous or inaccurate. Even such a seemingly direct perception as relative color. Similar illusions exist on the sky, such as the size of the Moon near the Horizon, or the apparent shapes of astronomical objects. The advent of automated, reproducible, measuring devices such as CCDs have made science in general and astronomy in particular less prone to, but not free of, human-biased illusions".MareKromium
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