Marte: in arrivo notizie sconvolgenti

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    Curiosity_Mars_00



    Fonte: http://www.coelum.com/

    La notizia, su cui la NASA mantiene però al momento uno stretto riserbo, è di poche ore fa.
    A quanto riferito da John Grotzinger, principal investigator della missione NASA/JPL, sembra che sia collegata a qualcosa rilevato in un campione di terreno prelevato giorni fa dal braccio robotico di Curiosity e sottoposto come sempre a SAM (un vero e proprio laboratorio chimico in grado di analizzare campioni di terreno e di identificarne eventuali composti organici), avrebbe mostrato qualcosa che Grotzinger non ha esitato a definire come “stupefacente”, e addirittura “sconvolgente” : “Questa scoperta entrerà nei libri di storia!”

    LINK




    EDIT aggiungo dettagli per i posteri:

    CITAZIONE (LoganGR @ 29/11/2012, 23:30) 
    complimenti a chi ha tradotto " alla C...O" di cane l'articolo, questa è la comunicazione ufficiale dal sito di curiosity

    CITAZIONE
    PASADENA, Calif. -- The next news conference about the NASA Mars rover Curiosity will be held at 9 a.m. Monday, Dec. 3, in San Francisco at the Fall Meeting of the American Geophysical Union (AGU).
    Rumors and speculation that there are major new findings from the mission at this early stage are incorrect. The news conference will be an update about first use of the rover's full array of analytical instruments to investigate a drift of sandy soil. One class of substances Curiosity is checking for is organic compounds -- carbon-containing chemicals that can be ingredients for life. At this point in the mission, the instruments on the rover have not detected any definitive evidence of Martian organics.

    The Mars Science Laboratory Project and its Curiosity rover are less than four months into a two-year prime mission to investigate whether conditions in Mars' Gale Crater may have been favorable for microbial life. Curiosity is exceeding all expectations for a new mission with all of the instruments and measurement systems performing well. This is spectacular for such a complex system, and one that is operated so far away on Mars by people here on planet Earth. The mission already has found an ancient riverbed on the Red Planet, and there is every expectation for remarkable discoveries still to come.

    fonte sito nasa

    direi che piu chiaro di cosi non ce n'è!



    Edited by LoganGR - 29/11/2012, 23:40
     
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    is-there-life-on-mars-vi



    Forse trovati precursori della vita.
    La sonda sul pianeta rosso potrebbe aver scoperto molecole organiche, composti senza i quali la vita non può svilupparsi. Lo dice Charles Elachi, della Nasa. Giorni fa un altro scienziato aveva annunciato una scoperta di portata storica. Se confermata, rilancerebbe l'affascinante ipotesi della vita su Marte.

    IMMAGINI



    VIDEO

     
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  3. FoxMulder91
     
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    Se confermata, questa sarebbe davvero una grande scoperta!
    Inevitabile chiedersi a questo punto se sia possibile che in passato ci possano essere state forme di vita (senzienti? O addirittura civiltà?) su Marte.
     
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    marteyi






    :lol:
     
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  5. LoganGR
     
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    complimenti a chi ha tradotto " alla C...O" di cane l'articolo, questa è la comunicazione ufficiale dal sito di curiosity

    CITAZIONE
    PASADENA, Calif. -- The next news conference about the NASA Mars rover Curiosity will be held at 9 a.m. Monday, Dec. 3, in San Francisco at the Fall Meeting of the American Geophysical Union (AGU).
    Rumors and speculation that there are major new findings from the mission at this early stage are incorrect. The news conference will be an update about first use of the rover's full array of analytical instruments to investigate a drift of sandy soil. One class of substances Curiosity is checking for is organic compounds -- carbon-containing chemicals that can be ingredients for life. At this point in the mission, the instruments on the rover have not detected any definitive evidence of Martian organics.

    The Mars Science Laboratory Project and its Curiosity rover are less than four months into a two-year prime mission to investigate whether conditions in Mars' Gale Crater may have been favorable for microbial life. Curiosity is exceeding all expectations for a new mission with all of the instruments and measurement systems performing well. This is spectacular for such a complex system, and one that is operated so far away on Mars by people here on planet Earth. The mission already has found an ancient riverbed on the Red Planet, and there is every expectation for remarkable discoveries still to come.

    fonte sito nasa

    direi che piu chiaro di cosi non ce n'è!
     
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  6. LoganGR
     
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    CITAZIONE
    Nasa: no materiale organico su Marte
    Agenzia, voci non corrette su base primi risultati

    (ANSA) - CAPE CANAVERAL, 29 NOV - Le prime analisi compiute sul suolo di Marte da Curiosity non hanno rilevato segni di materiale organico. E' quanto ha comunicato oggi la Nasa che definisce anche ''non corrette'' le voci e le speculazioni diffusesi su nuove importanti scoperte in queste prime fasi dell'esplorazione del pianeta rosso. (ANSA).

    fonte
     
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    Ma come!!! Prima danno l'annuncio di una scoperta che cambierà il corso della storia, il nostro modo di essere su questo pianeta e dopo aver speso miliardi di dollari per mandare quel robot semplicemente meraviglioso tecnologicamente avanzato, adesso ci dicono che non c'è nulla??? Non ci crederò mai. Qualcosa di molto grosso bolle in pentola...
    Di balle ne potevano inventare a iosa, ma a dire che non c'è nulla...
     
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  8. staffi
     
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    User deleted


    Questi se la suonano e se la cantano da soli.
    Del resto...Chi può smentirli?
     
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  9. LoganGR
     
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    non mi risulta che la nasa abbia mai detto una cosa del genere ! altre testate "giornalaie" invece ci hanno sicuramente ricamato sopra.
     
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    Non penso che sia andata così, ecco ad esempio un altra notizia, cosa faranno poi?? smentiranno??

    (ANSA) - ROMA, 30 NOV - I mattoni alla base della vita, sono state scoperte su Mercurio, il pianeta piu' vicino al Sole.

    Rivestono il ghiaccio d'acqua e sono state scoperte dalla sonda Messenger della Nasa nei crateri perennemente in ombra nel polo Nord di Mercurio. La scoperta, annunciata in tre studi pubblicati su Science, si deve ai gruppi coordinati dai ricercatori americani. Precedenti osservazioni radar suggerivano la presenza di ghiaccio nei crateri perennemente in ombra al polo Nord del pianeta.

    LINK

     
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  11. LoganGR
     
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    Ancora giornalai, per dire che la nasa dice cose false bisogna guardare le notizie della nasa non di chi parla per sentito dire

    questo è il sito ufficiale della messenger

    CITAZIONE
    MESSENGER Mission News
    November 29, 2012
    http://messenger.jhuapl.edu/

    --------------------------------------------------------------------------------
    MESSENGER Finds New Evidence for Water Ice at Mercury's Poles
    New observations by the MESSENGER spacecraft provide compelling support for the long-held hypothesis that Mercury harbors abundant water ice and other frozen volatile materials in its permanently shadowed polar craters.

    Three independent lines of evidence support this conclusion: the first measurements of excess hydrogen at Mercury's north pole with MESSENGER's Neutron Spectrometer, the first measurements of the reflectance of Mercury's polar deposits at near-infrared wavelengths with the Mercury Laser Altimeter (MLA), and the first detailed models of the surface and near-surface temperatures of Mercury's north polar regions that utilize the actual topography of Mercury's surface measured by MLA. These findings are presented in three papers published online today in Science Express.

    Given its proximity to the Sun, Mercury would seem to be an unlikely place to find ice. But the tilt of Mercury's rotational axis is almost zero -- less than one degree -- so there are pockets at the planet's poles that never see sunlight. Scientists suggested decades ago that there might be water ice and other frozen volatiles trapped at Mercury's poles.

    The idea received a boost in 1991, when the Arecibo radio telescope in Puerto Rico detected unusually radar-bright patches at Mercury's poles, spots that reflected radio waves in the way one would expect if there were water ice. Many of these patches corresponded to the location of large impact craters mapped by the Mariner 10 spacecraft in the 1970s. But because Mariner saw less than 50 percent of the planet, planetary scientists lacked a complete diagram of the poles to compare with the images.

    MESSENGER's arrival at Mercury last year changed that. Images from the spacecraft's Mercury Dual Imaging System taken in 2011 and earlier this year confirmed that radar-bright features at Mercury's north and south poles are within shadowed regions on Mercury's surface, findings that are consistent with the water-ice hypothesis.

    Now the newest data from MESSENGER strongly indicate that water ice is the major constituent of Mercury's north polar deposits, that ice is exposed at the surface in the coldest of those deposits, but that the ice is buried beneath an unusually dark material across most of the deposits, areas where temperatures are a bit too warm for ice to be stable at the surface itself.

    MESSENGER uses neutron spectroscopy to measure average hydrogen concentrations within Mercury's radar-bright regions. Water ice concentrations are derived from the hydrogen measurements. "The neutron data indicate that Mercury's radar-bright polar deposits contain, on average, a hydrogen-rich layer more than tens of centimeters thick beneath a surficial layer 10 to 20 centimeters thick that is less rich in hydrogen," writes David Lawrence, a MESSENGER Participating Scientist based at the Johns Hopkins University Applied Physics Laboratory and the lead author of one of the papers. "The buried layer has a hydrogen content consistent with nearly pure water ice."

    Data from MESSENGER's Mercury Laser Altimeter (MLA) -- which has fired more than 10 million laser pulses at Mercury to make detailed maps of the planet's topography -- corroborate the radar results and Neutron Spectrometer measurements of Mercury's polar region, writes Gregory Neumann of the NASA Goddard Flight Center. In a second paper, Neumann and his colleagues report that the first MLA measurements of the shadowed north polar regions reveal irregular dark and bright deposits at near-infrared wavelength near Mercury's north pole.

    "These reflectance anomalies are concentrated on poleward-facing slopes and are spatially collocated with areas of high radar backscatter postulated to be the result of near-surface water ice," Neumann writes. "Correlation of observed reflectance with modeled temperatures indicates that the optically bright regions are consistent with surface water ice."

    The MLA also recorded dark patches with diminished reflectance, consistent with the theory that the ice in those areas is covered by a thermally insulating layer. Neumann suggests that impacts of comets or volatile-rich asteroids could have provided both the dark and bright deposits, a finding corroborated in a third paper led by David Paige of the University of California, Los Angeles.

    Paige and his colleagues provided the first detailed models of the surface and near-surface temperatures of Mercury's north polar regions that utilize the actual topography of Mercury's surface measured by MLA. The measurements "show that the spatial distribution of regions of high radar backscatter is well matched by the predicted distribution of thermally stable water ice," he writes.

    According to Paige, the dark material is likely a mix of complex organic compounds delivered to Mercury by the impacts of comets and volatile-rich asteroids, the same objects that likely delivered water to the innermost planet. The organic material may have been darkened further by exposure to the harsh radiation at Mercury's surface, even in permanently shadowed areas.

    This dark insulating material is a new wrinkle to the story, says Sean Solomon of the Columbia University's Lamont-Doherty Earth Observatory, principal investigator of the MESSENGER mission. "For more than 20 years the jury has been deliberating on whether the planet closest to the Sun hosts abundant water ice in its permanently shadowed polar regions. MESSENGER has now supplied a unanimous affirmative verdict."

    "But the new observations have also raised new questions," adds Solomon. "Do the dark materials in the polar deposits consist mostly of organic compounds? What kind of chemical reactions has that material experienced? Are there any regions on or within Mercury that might have both liquid water and organic compounds? Only with the continued exploration of Mercury can we hope to make progress on these new questions."

    da notare che è una domanda e non una affermazione (in rosso)
     
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    La NASA: "Tracce di molecole inorganiche, come composti a base di acqua, cloro e zolfo sono state scoperte dal Mars Rover Curiosity, il veicolo robot della Nasa che sta esplorando Marte. Il Rover ha anche individuato molecole a base di carbonio e idrocarburi che potrebbero avere un'origine organica"

    LINK

     
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11 replies since 22/11/2012, 22:11   376 views
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