http___matrixworldhr.com_2011_10_09_venera-ima-ozonski-omotac-znaci-li-to-da-na-veneri-ima-zivota__1.xml
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Venus Dec 1, 2010New information about a high-altitude layer of sulphur dioxide on Venus could be a warning against injecting Earth's atmosphere with sulphur droplets to mitigate climate change. Sep 24, 2010The heat in the atmosphere of Venus, induced from a strong greenhouse warming, might actually have a cooling effect on the planet´s interior. Studying planetary processes on Venus can provide important information about climate change on rocky planets, such as Earth. Climate change could have Aug 4, 2010Scientists are reproducing the environment of Venus so that they can interpret observations of the planet's surface and atmosphere. Studying environmental processes on Venus can help astrobiologists better understand the climate systems of Earth and the habitability of rocky planets. Jun 26, 2010The European Space Agency's Venus Express is helping planetary scientists investigate whether Venus once had oceans. If it did, it may even have begun its existence as a habitable planet similar to Earth. Jul 15, 2009The European Space Agency's Venus Express mission has charted the first infrared map of Venus' southern hemisphere. The maps indicate that Venus may once have been more Earth-like, with plate tectonics and oceans of water. Oct 15, 2008Venus Express is being used to observe the Earth from its orbit around Venus. Astronomers hope that the data will help develop techniques to search for habitable planets around distant stars. May 22, 2008Hydroxyl has been found in the atmosphere of Venus. It's the first time the molecule has been spotted on another planet and will help scientists understand the workings of Venus's dense atmosphere. Feb 5, 2008Venus Express has peered below the thick clouds of Venus, and may yield important clues about climate change on Earth. Dec 2, 2007Venus Express has provided new data about the atmosphere of Venus, from the top down to nearly the surface. The findings show that the Venus may once have been more Earth-like and, to a certain extent, still is. Sep 1, 2007By using unique balloons to study the atmosphere and surface of Venus, scientists are hoping to learn more about climate change on Earth. Apr 13, 2007Venus Express has now spent one year collecting planetary data on Venus, one of the most mysterious planets in the Solar System. The spacecraft is studying aspects of Venus' complex atmosphere as well as searching for active volcanism on the planet's surface. Dec 31, 2006Astrobiology Magazine is looking back over 2006, highlighting the Top 10 astrobiology stories of the year. At number 8 is the arrival of ESA´s Venus Express spacecraft at the planet Venus. While the conditions on Venus are too hostile for life as we Nov 23, 2006The planet Venus is almost the same size as Earth, but it has an atmospheric pressure almost 100 times greater than Earth's, its clouds contain sulfuric acid, and its surface temperature hovers around 800 degrees Fahrenheit. All known forms of life would be broiled alive. Jul 15, 2006On 20 April 2006, after its first 9-day, elongated orbit around Venus, ESA s Venus Express started to get closer to the planet, until it reached its final 24-hour long orbit on 7 May. During this time, and up to today, the spacecraft has been Jun 29, 2006ESA's Venus Express data undoubtedly confirm for the first time the presence of a huge 'double-eye' atmospheric vortex at the planet's south pole. This striking result comes from analysis of the data gathered by the spacecraft during the first orbit around the planet.
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Preveli i uredili: Urednici Matrix Worlda Tanki sloj ozona, stotinu puta tanji od onoga kojeg ima Zemlja, otkriven je na Veneri, izjavila je ESA – Europska Svemirska Agencija (European Space Agency) uz pomoć letjelice Venus Express. Do sada je ozonski omotač detektiran samo u atmosferi Zemlje i Marsa, tako da je otkriće na Veneri bilo iznenađenje. Ovo otkriće može pomoći da bi rafinirali pretragu ozona na drugim planetima. Europska letjelica je spazila ozonski omotač ove planete kada je bila fokusirana na druge zvijezde koje je promatrala kroz Venerinu atmosferu. Udaljene zvijezde činile su se bljeđe nego li se očekivalo, jer je Venerin ozonski omotač apsorbirao nešto od UV svijetla. Ovo znanstveno istraživanje vodi Franck Montmessin s Instituta LATMOS za atmosferska istraživanja u Francuskoj. On je izjavio slijedeće: „Venerin se ozonski omotač se nalazi na 100 kilometara visine, što je na tri puta više od mjesta na kojemu se nalazi naš ozonski omotač.“ Molekule ozona sadržavaju tri atoma kisika – formiraju se na način da Sunčeva svijetlost razbija ugljični-dioksid u atmosferi Venere, i tako stvara dodatne molekule kisika. Na Zemlji ozon, koji apsorbira većinu štetnog solarnog UV zračenja, sprječava isto zračenje da dospije do površine planete, i formira se na sličan način kao i na Veneri. Neki astrobiolozi pretpostavljaju da prisustvo kisika i ugljika na Veneri može značiti da postoji život na površini planete Venere. Novi nalazi negiraju takve pretpostavke – jer samo prisustvo kisika u atmosferi ne daje dovoljno dokaza o direktnom postojanju života da bi se njega tražilo na planeti. Pa ipak, velike količine ovih plinova, koji postoje i u atmosferi Zemlje, su vjerojatno dobar trag, smatraju znanstvenici. „Mi možemo koristiti ove opservacije da bi testirali i rafinirali scenarij za detekciju života na drugim planetama,“ rekao je Dr. Montmessin. Komentar Matrix Worlda: Ozon je u velikim količinama pronađen na Marsu, i to u mnogostruko većim količinama negoli je otkriven na Veneri. Znanstvenici špekuliraju o životu na Veneri, a zbog nama nepoznatih razloga, izbjegavaju traženje života na Marsu. U mnogom Marsovskom stijenju koje je palo na Zemlju pronađeni su fosilizirani tragovi života, a za razliku od Venere čija atmosfera podsjeća na kiselinu, Mars je mnogo prijatnije mjesto na kojemu bi se (uza sve čudnovate fotografije koje su dospjele s njega na Zemlju) moglo uz velike količine leda pronaći i nešto više. Nadamo se da će znanost u skoroj budućnosti, umjesto traženja dalekih egzoplaneta koji kruže oko drugih zvijezda, odlučiti malo bolje upoznati i naše vlastito svemirsko susjedstvo unutar sunčevog sustava s više praktičnih letova, a manje špekulacija. Cijeli tekst pročitajte ovdje. Kategorije:SVEMIR KROZ TELESKOP