http___www.jutarnji.hr_voyager-prelazi-iz-suncevog-sustava-u-meduzvjezdani-prostor--dospio-je-najdalje-od-bilo-koje-letjelice-koju-je-u-svemir-uputio-covjek-_1046156__2.xml
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Signs Changing Fast for Voyager Two of three key signs of changes expected to occur at the boundary of interstellar space have changed faster than at any other time in the last seven years, according to new data from NASA’s Voyager 1 spacecraft. For the last seven years, Voyager 1 has been exploring the outer layer of the bubble of charged particles the Sun blows around itself. In one day, on July 28, data from Voyager 1’s cosmic ray instrument showed the level of high-energy cosmic rays originating from outside our solar system jumped by five percent. During the last half of that same day, the level of lower-energy particles originating from inside our solar system dropped by half. However, in three days, the levels had recovered to near their previous levels. A third key sign is the direction of the magnetic field, and scientists are eagerly analyzing the data to see whether that has, indeed, changed direction. Scientists expect that all three of these signs will have changed when Voyager 1 has crossed into interstellar space. A preliminary analysis of the latest magnetic field data is expected to be available in the next month. “These are thrilling times for the Voyager team as we try to understand the quickening pace of changes as Voyager 1 approaches the edge of interstellar space,” said Edward Stone, the Voyager project scientist based at the California Institute of Technology, Pasadena, Calif. “We are certainly in a new region at the edge of the solar system where things are changing rapidly. But we are not yet able to say that Voyager 1 has entered interstellar space.” The levels of high-energy cosmic ray particles have been increasing for years, but more slowly than they are now. The last jump — of five percent — took one week in May. The levels of lower-energy particles from inside our solar system have been slowly decreasing for the last two years. Scientists expect that the lower-energy particles will drop close to zero when Voyager 1 finally crosses into interstellar space. “The increase and the decrease are sharper than we’ve seen before, but that’s also what we said about the May data,” Stone said. “The data are changing in ways that we didn’t expect, but Voyager has always surprised us with new discoveries.” Voyager 1, which launched on Sept. 5, 1977, is 11 billion miles (18 billion kilometers) from the Sun. Voyager 2, which launched on Aug. 20, 1977, is close behind, at 9.3 billion miles (15 billion kilometers) from the Sun. “Our two veteran Voyager spacecraft are hale and healthy as they near the 35th anniversary of their launch,” said Suzanne Dodd, Voyager project manager based at NASA’s Jet Propulsion Laboratory, Pasadena. “We know they will cross into interstellar space. It’s just a question of when.” Data from the two Voyager spacecraft is helping astrobiologists better understand the structure and nature of our solar system. This is important in determining the conditions in our region of space that have allowed for Earth to develop as a habitable planet. Studying the Solar System can thereby help us determine whether or not distant solar systems are capable of harboring habitable, Earth-like worlds.
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'SVEMIR: POSLJEDNJA GRANICA!' Voyager prelazi iz Sunčevog sustava u međuzvjezdani prostor: Dospio je najdalje od bilo koje letjelice koju je u svemir uputio čovjek! NASA Brzinom od 16 kilometara u sekundi, kroz 35 godina je otputovao 17.8 milijardi kilometara daleko od Zemlje Istog dana kad je NASA-in Curiosity sletio na Mars, 6. kolovoza 2012., jedna od najranijih raketa poslanih u svemir oborila je još jedan rekord. Voyager 1 , poslan davne 1977., dospio je do najudaljenije točke od Zemlje do koje je ikad došao bilo koji objekt kojeg je u svemir uputio čovjek. Zapravo je Voyager, koji se kreće brzinom od 16 kilometara u sekundi, došao do samog ruba Sunčevog štita , tj. zaštitnog polja u kojem se nalazi naš Sunčev sustav i koji postoji zato što se nabijene čestice koje putuju od Sunca prema rubu Sunčevog sustava sudaraju s kozmičkim zrakama u međuzvjezdanom prostoru. Na Zemlju je Voyager poslao podatke koji potvrđuju da je prošao dvije "ključne promjene" koje su znanstvenici očekivali očitati na krajnjim dijelovima Sunčevog sustava, odnosno 17.8 milijardi kilometara daleko od Zemlje. 28. srpnja Voyager je očitao velike kozmičke promjene, odnosno naglo 5-postotno povećanje u razini kozmičkih zraka visokih energija. Istog je dana razina čestica nižih energija unutar Sunčevog sustava pala za pola. Iako NASA-ini znanstvenici još uvijek ne mogu sa 100-postotnom sigurnošću tvrditi da Voyager izlazi iz heliosfere, ovi podaci ukazuju na činjenicu da je to vrlo vjerojatno. NASA ipak iščekuje još podataka za analizu, s obzirom da su se očitanja vratila u normalne razine tijekom naredna tri dana. No postoji i treći pokazatelj da Voyager izlazi iz Sunčevog sustava, a to je smjer magnetskog polja. I ove podatke NASA još uvijek detaljno analizira. Tek nakon što se potvrde sva tri pokazatelja, NASA će moći potvrditi da je Voyager ušao u međuzvjezdani prostor. FACEBOOK KOMENTARI MINIMALNE PLAĆE U EUROPSKOJ UNIJI GDJE JE HRVATSKA NA LJESTVICI MINIMALACA? Mi smo pri dnu, ali u ovoj zemlji građani zarade minimalno 1923 eura! SUNCE IH MOŽE UBITI