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N76-PIA08516-2.jpgThe "N 76 Nebula"59 visiteThe supernova remnant1E0102.2-7219 sits next to the Nebula N76 in a bright, Star-Forming Region of the Small Magellanic Cloud, a satellite galaxy to our Milky Way galaxy located about 200.000 LY from Earth. A Supernova Remnant is made up of the messy bits and pieces of a massive star that exploded, or went Supernova. This image shows glowing dust grains in three wavelengths of infrared radiation: 24 microns (red) measured by the Multiband Imaging Photometer aboard NASA's Spitzer Space Telescope; and 8.0 microns (green) and 3.6 microns (blue) measured by Spitzer's infrared array camera. The red bubble is a dust envelope around the supernova remnant E0102, which is being heated by the shock wave created in the explosion of the remnant's massive progenitor star some 1,000 years ago. Most of the blue stars are in the Small Magellanic Cloud, though some are in our own galaxy.
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vl2_22a158.jpgThe "Rocky Horizon" of Utopia Planitia - Frame Viking Lander 2 n. 22a158 (Natural Colors - credits: NASA/JPL)59 visitenessun commento
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vl2_22a158_old.jpgThe "Rocky Horizon" of Utopia Planitia - Frame Viking Lander 2 n. 22a158 (Natural Colors - credits: NASA/JPL)59 visitenessun commento
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vl2_p17688.jpgUtopia Planitia - Frame Viking Lander 2 n. p1768859 visitenessun commento
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vl1_p20453.jpgFeatures of Chrise Planitia - Frame Viking Lander 1 n. p20453 59 visitenessun commento
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APOLLO 17 AS 17-M-0446-1.jpgAS 17-m-0446 - metric frames (1)59 visite
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APOLLO 17 AS 17-M-0447-2.jpgAS 17-m-0447 - metric frames (2)59 visite
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002-vg2_2670443.jpg002-Approaching Uranus...59 visite
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m10_aom_18.jpgMercury's "Inbound" view and Kuiper Crater59 visiteThis is a mosaic of images taken of Mercury taken from 125.000 miles away. The tiny, brightly rayed crater (just below center top) was the first recognizable feature on the Planet's surface and was named in memory of astronomer Gerard Kuiper, a Mariner 10 team member.
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m10_aom_19.jpgMercury's "Outbound" view59 visiteAfter passing on the darkside of the Planet, Mariner 10 photographed the other, somewhat more illuminated Hemisphere of Mercury.
The North Pole is at the top, two-thirds down from which is the Equator.
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M 42-PIA08655-ed.jpgThe "Great Cloud" around Orion59 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 Hole59 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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