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SPACE-SATURN-WINTER
This NASA Cassini spacecraft image released December 23, 2013 shows a blue hue in the southern hemispere that marks winter at Saturn. Winter is approaching in the southern hemisphere of Saturn and with this cold season has come the familiar blue hue that was present in the northern winter hemisphere at the start of NASA's Cassini mission. The changing blue hue that we have learned marks winter at Saturn is likely due to reduction of ultraviolet sunlight and the haze it produces, making the atmosphere clearer and increasing the opportunity for Rayleigh scattering (scattering by molecules and smaller particles) and methane absorption: both processes make the atmosphere blue. == RESTRICTED TO EDITORIAL USE / MANDATORY CREDIT: "AFP PHOTO / NASA/JPL-Caltech/SSI / NO SALES / NO MARKETING / NO ADVERTISING CAMPAIGNS / DISTRIBUTED AS A SERVICE TO CLIENTS ==
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Detalii fotografie |
| Loc: |
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SATURN, SPACE |
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| Sursa: |
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AFP / Mediafax Foto |
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| Fotograf: |
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HO |
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| Data: |
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24 Decembrie 2013 |
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| Dimensiuni: |
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5000 x 5000 (1.2 MB) |
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