| Piú viste - THE LUNAR EXPLORER ARCHIVES |
as17-148-22726.JPGAS 17-148-22726 - Africa, Madagascar, Arabic Peninsula and Antarctica60 visite
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Jupiter-2006-19-a-print.jpgJupiter and the "Red Spots"60 visite
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M 74-PIA08533_fig1.jpgM 74 and Supernova SN2003gd60 visiteThis image is the galaxy M 74, as seen by SST's infrared array camera. The white box to the left of the Galaxy's center identifies the location of the Supernova Remnant. In all the images, the blue dots represent hot gas and stars. The galaxy's cool dust is shown in red.
Astronomers using NASA's SST have spotted a "dust factory" 30 MLY away in the spiral galaxy M 74. The factory is located at the scene of a massive star's explosive death, or supernova.
While astronomers have suspected for years that supernovae could be producers of cosmic dust particles, the technology to confirm this suspicion has only recently become available.
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M 74-PIA08533_fig2.jpgSupernova SN2003gd in July 2004 (1)60 visiteThe dust factory, also known as supernova SN 2003gd, is shown at the center of the two small insets from Spitzer's infrared array camera. A white arrow points to its exact location.
The yellow-green dot shown in the July 2004 inset (here) shows that the source's temperature is warmer than the surrounding material. This is because newly formed dust within the Supernova is just starting to cool.
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M 74-PIA08533_fig3.jpgSupernova SN2003gd in January 2005 (2)60 visiteBy January 2005, the dust had cooled and completely faded from the camera's view (here). However, it was still detected in January 2005 by another instrument aboard Spitzer called the Multiband Imaging Photometer.
All the images are false-color, infrared composites, in which 3,6-micron light is blue, 4,5-micron light is green, and 8-micron light is red.
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M 74-PIA08533.jpgM 74 - Spiral Galaxy60 visite
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vom_mg01s306.jpgMars: according to Viking 2 Orbiter60 visite
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vl1_12b069.jpgChrise Planitia - Frame Viking Lander 1 n. 12b069 (Natural Colors; credits: NASA/JPL)60 visitenessun commento
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vl1_p17430.jpgFeatures of Chrise Planitia: the "Winds' Action" - Frame Viking Lander 1 n. p1743060 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)60 visitenessun commento
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vl1_p20453.jpgFeatures of Chrise Planitia - Frame Viking Lander 1 n. p20453 60 visitenessun commento
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Ma4-01E.jpgMars from Mariner 460 visitenessun commento
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