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ZZ-ZZ-ZZ-ZZ-LunarAnalemma_richins_f.jpgMoon's analemma (New Mexico)181 visiteDa "NASA - Picture of the Day" del 13 Luglio 2005:"An analemma is an 8-like curve that is gotten when you mark the position of the Sun at the same time each day for 1 year. To imaging an analemma of the Moon it is necessary to understand that, on average, the Moon returns to the same position in the sky about 51' later each day. So, photographing the Moon 51' later on successive days, over one lunation (or Lunar month) it will trace out an analemma-like curve as the actual position of the Moon wanders compared to the average - due to the Moon's tilted and elliptical orbit. (...) Multiple exposure image required some digital manipulation, particularly to include thin crescent phases in daytime skies".
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ZZ-ZZ-ZZ-ZZ-ZZ-LunarGreenFlash_laveder_f.jpgA "green flash" over the Moon141 visiteDa "NASA - Picture of the Day" del 26 Agosto 2005:"July's Full Moon looks strangely darkened and distorted in this remarkable telescopic view. The image is one of a series recorded when the Moon was very near the horizon. The long sight-line through a turbulent atmosphere gives rise to the tantalizing optical effects, including the thin "mirage" shape that seems to float just above the Moon's upper edge. Also seen (more easily in the inset), along the Moon's upper edge is a noticeable green rim. Substantial atmospheric refraction produces this prism-like effect -- related to the more commonly witnessed green flash of the setting Sun. Careful inspection of the full image reveals a corresponding red rim along the lower edge, another intriguing signature of atmospheric refraction".
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ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-ZZ-PIA07997-2-plusRover-A667R1.jpgVirtual Presence in Space109 visiteThis synthetic image of the Spirit MER on top of a rock called "Jibsheet" was produced using "Virtual Presence in Space" technology. Developed at NASA's Jet Propulsion Laboratory, Pasadena, Calif., this technology combines visualization and image-processing tools with Hollywood-style special effects. The image was created using a photorealistic model of the Rover and a false-color mosaic. The size of the Rover in the image is approximately correct and was based on the size of the Rover tracks in the mosaic. The mosaic was assembled from frames taken by the Pan-Cam on the Rover's 489th Martian day (May 19, 2005); see PIA07997.
Because this synthesis provides viewers with a sense of their own "virtual presence" (as if they were there themselves), such views can be useful to mission teams in planning exploration by enhancing perspective and a sense of scale.
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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?!?72 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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Zodiacal_Light_over_NM.jpgZodiacal Light over New Mexico80 visitenessun commentoMareKromium
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Zodiacal_beletsky_big.jpgZodiacal Light and the False Dawn70 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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ancients_legacy_1600.jpgUniversal Legacy117 visite
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before_the_storm_1600.jpgBefore the Storm...128 visite
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cove_of_dreams_1600.jpgTell me the Truth...131 visite
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crater_fog2_1600.jpgIn the Mist115 visite
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endless.jpgEndless Lights142 visitenessun commentoMareKromium
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galaxy-peak-1600.jpgHome of the Landlord186 visitenessun commento
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