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Vecchio 16-03-2007, 11.47.09   #1
infinitopiuuno
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Immense ice deposits found at south pole of Mars

By Will Dunham
Thu Mar 15, 3:00 PM ET


WASHINGTON (Reuters) - A spacecraft orbiting Mars has scanned huge deposits of water ice at its south pole so plentiful they would blanket the planet in 36 feet of water if they were liquid, scientists said on Thursday.

ADVERTISEMENT

The scientists used a joint NASA-Italian Space Agency radar instrument on the European Space Agency Mars Express spacecraft to gauge the thickness and volume of ice deposits at the Martian south pole covering an area larger than Texas.

The deposits, up to 2.3 miles thick, are under a polar cap of white frozen carbon dioxide and water, and appear to be composed of at least 90 percent frozen water, with dust mixed in, according to findings published in the journal Science.

Scientists have known that water exists in frozen form at the Martian poles, but this research produced the most accurate measurements of just how much there is.

They are eager to learn about the history of water on Mars because water is fundamental to the question of whether the planet has ever harbored microbial or some other life. Liquid water is a necessity for life as we know it.

Characteristics like channels on the Martian surface strongly suggest the planet once was very wet, a contrast to its present arid, dusty condition.

Jeffrey Plaut of NASA's Jet Propulsion Laboratory in Pasadena, California, who led the study, said the same techniques are being used to examine similar ice deposits at the Martian north pole.

Radar observations made in late 2005 and early 2006 provided the data on the south pole, and similar observations were taken of the north pole in the past several months, Plaut said.

Plaut, part of an international team of two dozen scientists, said a preliminary look at this data indicated the ice deposits in at the north pole are comparable to those at the south pole.

SEARCH FOR LIFE

"Life as we know it requires water and, in fact, at least transient liquid water for cells to survive and reproduce. So if we are expecting to find existing life on Mars we need to go to a location where water is available," Plaut said.

"So the polar regions are naturally a target because we certainly know that there's plenty of H2O there."

Some of the new information even hints at the possible existence of a thin layer of liquid water at the base of the deposits.

But while images taken by NASA's Mars Global Surveyor spacecraft made public in December suggested the presence of a small amount of liquid water on the surface, researchers are baffled about the fate of most of the water. The polar deposits contain most of the known water on Mars.

Plaut said the amount of water in the Martian past may have been the equivalent of a global layer hundreds of meters deep, while the polar deposits represent a layer of perhaps tens of meters.

"We have this continuing question facing us in studies of Mars, which is: where did all the water go?" Plaut said.

"Even if you took the water in these two (polar) ice caps and added it all up, it's still not nearly enough to do all of the work that we've seen that the water has done across the surface of Mars in its history."

Plaut said it appears perhaps 10 percent of the water that once existed on Mars is now trapped in these polar deposits. Other water may exist below the planet's surface or perhaps some was lost into space through the atmosphere, Plaut said.
___________________________________

Wt sta morendo.....
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Vecchio 16-03-2007, 11.50.16   #2
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Puoi star tranquillo che i cinesi troveranno il modo di importare ghiaccio da MARTE
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Vecchio 16-03-2007, 11.56.07   #3
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Interessante... sei sicuro di averla postata nel forum giusto??

Senti... tanto che ci sei mettici una bella news da S.Paolo del Brasile no?? Se poi ci fosse anche la cronaca di Osasco sarebbe una vera figata!!
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Vecchio 16-03-2007, 11.56.39   #4
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AZZ... Marte è pieno di acqua... davvero incredibile.
___________________________________

"Society doesn’t need newspapers. What we need is journalism." - Clay Shirky
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Vecchio 16-03-2007, 11.58.18   #5
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Sonda encontra gelo no pólo sul de Marte

Uma sonda européia orbitando Marte descobriu enormes quantidades de água na forma de gelo no pólo sul do planeta. Os cientistas usaram um radar acoplado à sonda Mars Express, da Agência Espacial Européia (ESA), para medir a densidade e o volume de gelo depositado no pólo sul marciano.

Esses depósitos, com mais de 3,7 quilômetros de espessura, estão sob uma cobertura branca de dióxido de carbono (CO2) congelado e água, e parecem ser compostos por pelo menos 90% de água em estado sólido.

Os cientistas já sabiam da existência de água congelada nos pólos marcianos, mas esta medição foi a primeira a dar uma noção do quanto da substância existe no planeta. Os cientistas estão ávidos por descobrir a história da água em Marte porque essa substância é fundamental para saber se o planeta alguma vez abrigou vida.

Canais presentes na superfície marciana são fortes evidências de que o planeta já teve água em forma líquida - substância fundamental para a vida.
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Wt sta morendo.....
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Vecchio 16-03-2007, 12.01.29   #6
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LOOOOOOOOOOL
che caca thread
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Vecchio 16-03-2007, 12.03.50   #7
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El agua congelada de Marte es suficiente para cubrir todo el planeta

Está concentrada en una enorme masa de hielo situada en el polo sur.
Agencia EFE


Washington. La sonda Mars Express descubrió una enorme masa de agua congelada bajo el polo sur de Marte, reveló ayer el Laboratorio de Propulsión a Chorro (JPL) de la Nasa.

Un comunicado de JPL señaló que esa región polar contiene suficiente agua congelada como para cubrir toda la superficie del planeta con una capa líquida de 11 metros de profundidad.

"Los depósitos del polo sur marciano cubren una región mayor que la superficie del estado de Texas (Estados Unidos). La cantidad de agua que contienen había sido calculada antes, pero nunca con tanta precisión", manifestó Jeffrey Plaut, científico de JPL.

La misión de Mars Express es una operación conjunta de la Nasa y de la Agencia Espacial Europea y la masa de hielo fue detectada por el "Radar avanzado para investigación subterránea y ionosférica de Marte" (Marsis, por sus siglas en inglés).

Ese instrumento, desarrollado de forma conjunta por la Nasa y la Agencia Espacial de Italia, también está investigando el grosor de depósitos similares en el polo norte marciano, señaló JPL.

El comunicado de JPL cita declaraciones de Giovanni Picardi, de la Universidad de Roma La Sapienza e investigador principal a cargo del instrumento, quien manifiesta que "Marsis demuestra ser un instrumento muy poderoso para investigar bajo la superficie de Marte".

Las capas de hielo polar contienen la mayor parte del agua existente en Marte, aun cuando hay otras zonas que parecen haber sido húmedas en el pasado, según JPL.

"Comprender la historia y la suerte corrida por el agua en Marte es clave para comprender si el planeta tuvo vida, ya que toda la vida depende del agua líquida", señaló JPL.

Se suma a Saturno. El martes pasado se dio a conocer que en la luna Encélado de Saturno se encontraron los ingredientes necesarios para la vida extraterrestre: compuestos orgánicos simples, una fuente de calor y agua líquida. Sin embargo, se aclaró que eso no significa la existencia de vida.

Esos tres ingredientes sólo se encontraron en pocos lugares del Sistema Solar y todos en forma separada. Además de Marte, también en la luna Europa de Júpiter se descubrió agua.

Además, el martes pasado la Nasa anunció el descubrimiento de inmensos mares, probablemente de metano o etano, en la luna Titán de Saturno, pero hasta el momento no hay indicios concluyentes de que en esos mares haya algún tipo de líquido.
___________________________________

Wt sta morendo.....
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Vecchio 16-03-2007, 12.05.14   #8
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Quota:
Inviato da Robbi
LOOOOOOOOOOL
che caca thread
Azz..è importante Beto! Acqua su Marte significa possibilità passata di vita e forse di vita intelligente!
___________________________________

Wt sta morendo.....
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Vecchio 16-03-2007, 12.16.15   #9
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Riesige Eisvorkommen am Südpol des Mars entdeckt

Forscher haben am Südpol des Planeten Mars riesige Eisvorkommen entdeckt. Zwar sei die genaue Zusammensetzung noch unbekannt, doch handelt es sich vermutlich vorwiegend um gefrorenes Wasser, heißt es in einer im Fachmagazin "Science" veröffentlichten Studie. Die Forscher glauben, das größte bislang bekannte Eisreservoir auf dem Mars aufgespürt zu haben: In geschmolzenem Zustand würde der Studie zufolge den ganzen Planeten mit einer elf Meter tiefen Wasserschicht bedecken.

Die Eisvorkommen entdeckten die Forscher mit Hilfe eines Radargeräts an Bord der europäischen Raumsonde Mars Express, das rund 3,7 Kilometer tief unter die Oberfläche des Planeten dringen kann. Auf dieselbe Weise hatten sie im November 2005 erstmals festgestellt, dass der Mars unter seiner Oberfläche über Wasservorräte verfügt.

Inzwischen gehen die meisten Forscher davon aus, dass der heute knochentrockene Planet früher einmal Seen beherbergte und eine Erd-ähnliche Atmosphäre aufwies - und somit die Voraussetzung besaß für die ein oder andere Form von Leben.!!!!!!!!!!!!!
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Wt sta morendo.....
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Vecchio 16-03-2007, 12.19.08   #10
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Pensa... sembra che abbiano trovato i primi batteri intelligenti!
ma sono stufi dell'acqua, vorrebbero qualche bottiglione di whisky e anche una mezza zoccola se avanza!

cmq
nao espanol... portugues!
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Vecchio 16-03-2007, 12.22.20   #11
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By Will Dunham
Thu Mar 15, 3:00 PM ET


WASHINGTON (Reuters) - A spacecraft orbiting Mars has scanned huge deposits of water ice at its south pole so plentiful they would blanket the planet in 36 feet of water if they were liquid, scientists said on Thursday.

ADVERTISEMENT

The scientists used a joint NASA-Italian Space Agency radar instrument on the European Space Agency Mars Express spacecraft to gauge the thickness and volume of ice deposits at the Martian south pole covering an area larger than Texas.

The deposits, up to 2.3 miles thick, are under a polar cap of white frozen carbon dioxide and water, and appear to be composed of at least 90 percent frozen water, with dust mixed in, according to findings published in the journal Science.

Scientists have known that water exists in frozen form at the Martian poles, but this research produced the most accurate measurements of just how much there is.

They are eager to learn about the history of water on Mars because water is fundamental to the question of whether the planet has ever harbored microbial or some other life. Liquid water is a necessity for life as we know it.

Characteristics like channels on the Martian surface strongly suggest the planet once was very wet, a contrast to its present arid, dusty condition.

Jeffrey Plaut of NASA's Jet Propulsion Laboratory in Pasadena, California, who led the study, said the same techniques are being used to examine similar ice deposits at the Martian north pole.

Radar observations made in late 2005 and early 2006 provided the data on the south pole, and similar observations were taken of the north pole in the past several months, Plaut said.

Plaut, part of an international team of two dozen scientists, said a preliminary look at this data indicated the ice deposits in at the north pole are comparable to those at the south pole.

SEARCH FOR LIFE

"Life as we know it requires water and, in fact, at least transient liquid water for cells to survive and reproduce. So if we are expecting to find existing life on Mars we need to go to a location where water is available," Plaut said.

"So the polar regions are naturally a target because we certainly know that there's plenty of H2O there."

Some of the new information even hints at the possible existence of a thin layer of liquid water at the base of the deposits.

But while images taken by NASA's Mars Global Surveyor spacecraft made public in December suggested the presence of a small amount of liquid water on the surface, researchers are baffled about the fate of most of the water. The polar deposits contain most of the known water on Mars.

Plaut said the amount of water in the Martian past may have been the equivalent of a global layer hundreds of meters deep, while the polar deposits represent a layer of perhaps tens of meters.

"We have this continuing question facing us in studies of Mars, which is: where did all the water go?" Plaut said.

"Even if you took the water in these two (polar) ice caps and added it all up, it's still not nearly enough to do all of the work that we've seen that the water has done across the surface of Mars in its history."

Plaut said it appears perhaps 10 percent of the water that once existed on Mars is now trapped in these polar deposits. Other water may exist below the planet's surface or perhaps some was lost into space through the atmosphere, Plaut said.
Io dormo nella paglia e mi lavo con la segatura.

Non ho capito una minc@ia
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SOS ABRUZZO
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Vecchio 16-03-2007, 12.25.20   #12
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Anni fa' quando mandarono la sonda Pathfinder
arrivo' un contadino Marziano e disse

Ecco dov'era finito il mio falciaerba
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Vecchio 16-03-2007, 12.31.10   #13
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Anni fa' quando mandarono la sonda Pathfinder
arrivo' un contadino Marziano e disse

Ecco dov'era finito il mio falciaerba
___________________________________

SOS ABRUZZO
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Vecchio 16-03-2007, 15.13.22   #14
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Se confermata ulteriormente potrebbe essere una spinta maggiore al primo viaggio umano verso un altro pianeta del nostro star system....
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I grandi spiriti hanno sempre incontrato violenta opposizione da parte delle menti mediocri.
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Vecchio 16-03-2007, 16.57.16   #15
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Non è mica una notizia da poco!
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