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Thursday, January 17, 2008

THE OTHER FACE of MERCURY.

Until now, we had only available photos of one side of Mercury (orbit the sun in 88 days, surface similar to the moon, atmosphere containing small amounts of H, He, K and Na), captured by the cameras of the space american probe: "Mariner 10" (1974-1975). Since then, we knew that the thin atmosphere of Mercury had allowed the constant impaction of its surface by many asteroids. Now, the first images (distance: 27000 km-taken 80 minutes after its closest approach to Mercury, with details of up to 10 km), sent by the american probe "Messenger" (NASA/Cape Cañaveral/2004) showed again in the surface of the unknown face of Mercury, many craters of various sizes. In Caloris Basin, its central areas are brilliant (conditioned by the impact of a huge asteroid) and outdoor areas more obscure. At the center of the surface of Mercury, can be seen also numerous craters with borders more obscure than usual. It is believed that Caloris-region, is the area most recently impacted in our solar system. The probe is currently passing close to the planet. It was not until March 2011, when the probe will orbit permanently Mercury.

LA OTRA CARA de MERCURIO

Hasta ahora solo disponiamos de fotos de una sola cara de Mercurio, (orbita al sol, en 88 dias, superficie similar a la Luna, atmósfera conteniendo pequeñas cantidades de H, He, K y NA), captadas por las cámaras de la sonda especial americana : "Mariner 10"(1974-1975). Desde entonces, supimos que la delgada atmósfera de Mercurio permitió la constante impactación de su superficie, por numerosos asteroides. Las primeras imágenes (distancia :27 000 km -tomadas 80 minutos después de su aproximación mas cercana al planeta, con detalles de hasta 10 km), enviadas por la sonda “Messenger” (NASA/Cabo Cañaveral/2004), muestran nuevamente en la superficie de la cara desconocida de Mercurio, numerosos cráteres de diversos tamaños. En el crater de Caloris Basin, se aprecian areas centrales brillantes (condicionadas por el impacto de un enorme asteroide) y areas exteriores mas oscuras. En el centro de la superficie de Mercurio, se aprecian cráteres con limites mas oscuros que lo usual. Se cree que Caloris-region, es el area mas recientemente impactada en nuestro sistema solar. La sonda realiza actualmente pases cercanos al planeta. Recién en Marzo del 2011, orbitará permanentemente Mercurio.

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