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acrylic prints planet acrylic prints mercury acrylic prints atmosphere acrylic prints merc acrylic prints astronomy acrylic prints cosmology acrylic prints science acrylic prints planetary acrylic prints false-coloured acrylic prints

photographs planet photos mercury photos atmosphere photos merc photos astronomy photos cosmology photos science photos planetary photos false-coloured photos

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False-colour images of reflected sunlight (left) and atmospheric sodium (right) on Mercury, made at the Kitt Peak Solar Observatory over a period of 3 days. The red-dotted areas denote Mercury's night side. The distribution of sodium in the atmosphere shows a strong daily variation, mainly around the poles (red/yellow or green). This suggests that sodium vapour density is related to magnetic influences. The magnetic field causes electrons and sodium ions to migrate to the surface near the poles. There the ions are neutralised by the electrons and are released as a vapour, or are simply ejected by the strong magnetic field.

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