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DeskribapenaCraters-Alone-HaloCraters Annotated.jpg |
English: Within Pluto’s informally named Vega Terra region is a field of eye-catching craters that looks like a cluster of bright halos scattered across a dark landscape.
The region is far west of the hemisphere NASA’s New Horizons spacecraft viewed during close approach last summer. The upper image – in black and white – sports several dozen “haloed” craters. The largest crater, at bottom-right, measures about 30 miles (50 kilometers) across. The craters’ bright walls and rims stand out from their dark floors and surrounding terrain, creating the “halo” effect. In the lower image, composition data from New Horizons’ Ralph/Linear Etalon Imaging Spectral Array (LEISA) indicate a connection between the bright halos and distribution of methane ice, shown in false color as purple. The floors and terrain between craters show signs of water ice, colored in blue. Exactly why the bright methane ice settles on these crater rims and walls is a mystery; also puzzling is why this same effect doesn’t occur broadly across Pluto. The upper view is a mosaic made from two separate images obtained by New Horizons’ Long Range Reconnaissance Imager (LORRI). A high-resolution strip taken at approximately 760 feet (232 meters) per pixel is overlain on a broader, low-resolution image taken at 2,910 feet (889 meters) per pixel. The images were obtained at ranges of 28,800 miles (46,400 kilometers) and 106,700 miles (171,700 kilometers) from Pluto, respectively, on July 14, 2015. The LEISA data came the same day, during the instrument’s highest-resolution scan of Pluto, with New Horizons 28,000 miles (45,500 kilometers) from Pluto, with a resolution of 1.7 miles (2.7 kilometers) per pixel. |
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http://pluto.jhuapl.edu/Multimedia/Science-Photos/pics/Craters-Alone-HaloCraters_Annotated.jpg See also http://photojournal.jpl.nasa.gov/catalog/PIA20656 |
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Egilea | NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute | ||||||
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21 apirila 2016
media type ingelesa
image/jpeg
checksum ingelesa
adcef0fbc2fe15ee6e9ce5c8ff505075b10b0d8d
data size ingelesa
1.828.432 Byte
3.368 pixel
2.523 pixel
Fitxategiaren historia
Data/orduan klik egin fitxategiak orduan zuen itxura ikusteko.
Data/Ordua | Iruditxoa | Neurriak | Erabiltzailea | Iruzkina | |
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oraingoa | 04:45, 24 apirila 2016 | ![]() | 2.523 × 3.368 (1,74 MB) | PlanetUser | Transferred from http://pluto.jhuapl.edu/Multimedia/Science-Photos/pics/Craters-Alone-HaloCraters_Annotated.jpg |
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Fitxategi honek informazio gehigarri dauka, ziurrenik kamera digital edo eskanerrak egiterako momentuan gehitutakoa. Hori dela-eta, jatorrizko fitxategi hori aldatu egin bada, baliteke xehetasun batzuek errealitatearekin bat ez egitea.
Zabalera | 3.235 px |
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Altuera | 2.420 px |
Pixelen konposaketa | Zuri-beltza (beltza 0 da) |
Orientazioa | Arrunta |
Atal kopurua | 4 |
Bereizmen horizontala | 72 dpi |
Bereizmen bertikala | 72 dpi |
Erabilitako softwarea | Adobe Photoshop CS6 (Macintosh) |
Fitxategi aldaketaren data eta ordua | 11:31, 17 apirila 2016 |
Exif bertsioa | 2.21 |
Kolore tartea | sRGB |
Jatorrizko dokumentuaren ID bakarra | BCC7D080D9C1D907C955B6AF5D60D831 |
Digitalizazioaren data eta ordua | 08:48, 11 apirila 2016 |
Datuaren metadata azken aldiz aldatu da | 04:31, 17 apirila 2016 |