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vl2_22a158_old.jpgThe "Rocky Horizon" of Utopia Planitia - Frame Viking Lander 2 n. 22a158 (Natural Colors - credits: NASA/JPL)58 visitenessun commento
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vl2_22e169_old.jpgAntenna Mast - Frame Viking Lander 2 n. 22e169 (Natural Colors; credits: NASA/JPL)58 visitenessun commento
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vl2_p21841.jpgMorning "frost" over Utopia Planitia - Frame Viking Lander 2 n. p21841 (Original NASA RAW b/w Frame)58 visitenessun commento
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vl1_p20453.jpgFeatures of Chrise Planitia - Frame Viking Lander 1 n. p20453 58 visitenessun commento
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vl1_p17428~0.jpgLow Sun over Chrise Planitia - Frame Viking Lander 1 n. p1742858 visitenessun commento
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APOLLO 17 AS 17-M-0446-1.jpgAS 17-m-0446 - metric frames (1)58 visite
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APOLLO 17 AS 17-M-0447-2.jpgAS 17-m-0447 - metric frames (2)58 visite
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002-vg2_2670443.jpg002-Approaching Uranus...58 visite
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m10_aom_3_8.jpgTerraced Mercurian Crater with multiple central Peaks (HR)58 visiteThis crater (about 74 Km diameter) just North of the Caloris Planitia displays interior and central peaks rising up from a hilly floor. The continuous ejecta deposits and secondary crater field are well defined.
This image (FDS 79) was taken during the spacecraft's first encounter with Mercury.
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m10_aom_3_a.jpg58 visitenessun commento
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M 42-PIA08655-ed.jpgThe "Great Cloud" around Orion58 visiteThis image composite shows a part of the Orion constellation surveyed by NASA's Spitzer Space Telescope. The shape of the main image was designed by astronomers to roughly follow the shape of Orion cloud A, an enormous star-making factory containing about 1,800 young stars. This giant cloud includes the famous Orion nebula (bright circular area in "blade" part of hockey stick-shaped box at the bottom), which is visible to the naked eye on a clear, dark night as a fuzzy star in the hunter constellation's sword.
The region that makes up the shaft part of the hockey stick box stretches 70 light-years beyond the Orion nebula. This particular area does not contain massive young stars like those of the Orion nebula, but is filled with 800 stars about the same mass as the sun. These sun-like stars don't live in big "cities," or clusters, of stars like the one in the Orion nebula; instead, they can be found in small clusters (right inset), or in relative isolation (middle insert).
In the right inset, developing stars are illuminating the dusty cloud, creating small wisps that appear greenish. The stars also power speedy jets of gas (also green), which glow as the jets ram into the cloudy material.
Since infrared light can penetrate through dust, we see not only stars within the cloud, but thousands of stars many light-years behind it, which just happen to be in the picture like unwanted bystanders. Astronomers carefully separate the young stars in the Orion cloud complex from the bystanders by looking for their telltale infrared glow.
The infrared image shows light captured by Spitzer's infrared array camera. Light with wavelengths of 8 and 5.8 microns (red and orange) comes mainly from dust that has been heated by starlight. Light of 4.5 microns (green) shows hot gas and dust; and light of 3.6 microns (blue) is from starlight.
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Black Hole-PIA08696.jpgBlack Hole58 visiteThis artist's concept depicts a supermassive black hole at the center of a galaxy. NASA's Galaxy Evolution Explorer found evidence that black holes -- once they grow to a critical size -- stifle the formation of new stars in elliptical galaxies. Black holes are thought to do this by heating up and blasting away the gas that fuels star formation.
The blue color here represents radiation pouring out from material very close to the black hole. The grayish structure surrounding the black hole, called a torus, is made up of gas and dust. Beyond the torus, only the old red-colored stars that make up the galaxy can be seen. There are no new stars in the galaxy.
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