Jump to content
  • Buscar en
    • Más opciones...
    Encontrar resultados que contengan...
    Encontrar resultados en...

Archivado

Este tema ahora está archivado y cerrado a otras respuestas.

whydah

Mercurio se está encogiendo. NASA dixit

Publicaciones recomendadas

whydah Duque de Atizes

Publicado
vida restante: 100%

https://www.nasa.gov...ound-on-mercury


 



 


Scientists used stereo images from NASAs MESSENGER spacecraft to create a high-resolution topo map that revealed the broad valley -- more than 620 miles (1,000 kilometers) long -- extending into the Rembrandt basin, one of the largest and youngest impact basins on Mercury. About 250 miles (400 kilometers) wide and 2 miles (3 kilometers) deep, Mercurys great valley is smaller than Mars Valles Marineris, but larger than North Americas Grand Canyon and wider and deeper than the Great Rift Valley in East Africa.


Unlike Earths Great Rift Valley, Mercurys great valley is not caused by the pulling apart of lithospheric plates due to plate tectonics; it is the result of the global contraction of a shrinking one-plate planet, said Tom Watters, senior scientist at the Smithsonian National Air and Space Museum. Watters is the lead author of a paper published in Geophysical Research Letters using images from NASAs MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) spacecraft during the orbital phase of its mission.


 


Mercurys great valley is bound by two large fault scarpscliff-like landforms that resemble stair steps. The scarps formed as Mercurys interior cooled; the planets shrinking was accommodated by the crustal rocks being pushed together, thrusting them upward along fault lines. However, the valley is not only the product of two large, parallel, fault scarpsthe elevation of the valley floor is below that of the surrounding terrain, suggesting that another process may be at work.     


The most likely explanation for Mercurys great valley is long-wavelength buckling of the planets outermost shell in response to global contraction or shrinking. Cooling of Mercurys interior caused the planets single outer crust plate to contract and bend. Crustal rocks were thrust upward while the emerging valley floor sagged downward. The sagging valley floor lowered part of the rim of the Rembrandt basin as well.


There are similar examples of this on Earth involving both oceanic and continental plates, but this may be the first evidence of this geological process on Mercury, Watters said.



 


Compartir este mensaje


Enlace al mensaje
Compartir en otros sitios web

Boxicated Mis Lumis ?

Publicado
vida restante: 100%

Uffff... mi inglés es algo mierda.... T_T


 


Alguien tan amable hace un resumen? 



150217113823684162.png

                                                                                           

Compartir este mensaje


Enlace al mensaje
Compartir en otros sitios web

bonferrero Sheikah

Publicado
vida restante: 0%

Uffff... mi inglés es algo ........

 

Es lo minimo que deberían hacer en un puto foro ESPAÑOL.

Compartir este mensaje


Enlace al mensaje
Compartir en otros sitios web

Alec86 KRATOS

Publicado
vida restante: 100%

Tampoco cuesta nada poner en google el título en español a quien le interese la noticia. LLeva dos segundos.



                                         

Compartir este mensaje


Enlace al mensaje
Compartir en otros sitios web

  • Explorando recientemente

    No hay usuarios registrados viendo esta página.

  • Crear nuevo...