Images at
http://spaceflight1.nasa.gov/gallery/images/apollo/index.html
Saturday, May 11, 2013
Sun reflection
Courtesy: NASA Apollo 8
View of Earth as photographed by the Apollo 8 astronauts on their return trip from the moon. The terminator crosses Australia. India is visible. The sun reflection is within the Indian Ocean.
View of Earth as photographed by the Apollo 8 astronauts on their return trip from the moon. The terminator crosses Australia. India is visible. The sun reflection is within the Indian Ocean.
Sunday, July 1, 2012
Huge and old crater in Groenlandia
Descubren cráter del asteroide más antiguo y grande en Groenlandia
"Un cráter de 100 kilómetros de ancho fue descubierto en Groenlandia y corresponde al impacto más antiguo y del asteroide más grande que se conoce hasta ahora, asegura un artículo publicado en la revista Earth and Planetary Science Letters."
"Un cráter de 100 kilómetros de ancho fue descubierto en Groenlandia y corresponde al impacto más antiguo y del asteroide más grande que se conoce hasta ahora, asegura un artículo publicado en la revista Earth and Planetary Science Letters."
Tuesday, June 12, 2012
Ancient Rainfall, Carved in Stone
"Stalactites grow from cave ceilings not as dull cones but often sporting elegant corrugations. In Physical Review Letters, two Italian researchers now explain these mysterious, wavy patterns using standard fluid mechanics. Their theory shows that the horizontal ripples form because spatially periodic patterns arise in the rate of mineral deposits from the water flowing down the stalactite. Starting from this model, climate scientists might in the future use stalactite surface structure to reconstruct variations in precipitation patterns over tens of thousands of years."Ancient Rainfall, Carved in Stone
Friday, June 1, 2012
Uturuncu
"Uturuncu, or Uturunku, the highest summit in southwestern Bolivia, is astratovolcano. ...Researchers have determined that a large, roughly circular "disc" of land surrounding the volcano, approximately 70 km across, has been rising at a rate of 1 to 2 cm per year since at least the early 1990s, making it "one of the fastest uplifting volcanic areas on the Earth"." http://en.wikipedia.org/wiki/Uturuncu
and also: Temen que supervolcán Uturuncu se prepare para explotar en Bolivia
http://www.connuestroperu.com/mundo/32/24804-temen-que-supervolcan-uturuncu-se-prepare-para-explotar-en-bolivia
and also: Temen que supervolcán Uturuncu se prepare para explotar en Bolivia
http://www.connuestroperu.com/mundo/32/24804-temen-que-supervolcan-uturuncu-se-prepare-para-explotar-en-bolivia
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