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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce




    For every complex question, there's a simple answer that's completely wrong.
    rozbalit záhlaví
    VIRGO
    VIRGO --- ---
    JAYME: No jo, on byl takové tajemství, o kterém všichni věděli.
    To víš, po fašistovi přišel bolševik, a bylo třeba tlačit na bránu, bez něj by to zřejmě projeli.
    Ale jinak to byl velký showman a charismatická osobnost - dle těch co jej zažili osobně.

    Ale Nathan Fillion v náhledu videa mě teda rozbil! :))
    JAYME
    JAYME --- ---
    1 odpověď+2
    sorry jestli bylo. pomerne originalni vypravec. doted jsem zil v tom, ze ho Americani radsi moc verejne neukazovali :)

    The story of Apollo 11 narrate by Wernher Von Braun - RARE DOCUMENTARY 1969
    https://www.youtube.com/watch?v=CUPIemu8p9s
    VIRGO
    VIRGO --- ---
    +1
    Tak a přišel čas plánovat jarní dovolenou!

    Pic du midi (Great Sites of Midi-Pyrénées)
    https://vimeo.com/59652324


    Pic du Midi - Top Tourist Destinations in Midi-Pyrénées
    http://www.tourism-midi-pyrenees.co.uk/...es/man-made-structures-and-natural-attractions/pic-du-midi
    HOWKING
    HOWKING --- ---
    VIRGO: :-DDD
    VIRGO
    VIRGO --- ---
    1 odpověď+3
    HOWKING: Máš nový mobil? :D
    HOWKING
    HOWKING --- ---
    1 odpověď+7
    VIRGO
    VIRGO --- ---
    Hubble finds big brother of Halley’s Comet ripped apart by white dwarf | ESA/Hubble
    http://www.spacetelescope.org/news/heic1703/

    Scientists using the NASA/ESA Hubble Space Telescope have observed, for the first time, a massive, comet-like object that has been
    ripped apart and scattered in the atmosphere of a white dwarf. The destroyed object had a chemical composition similar to Halley’s Comet,
    but was 100 000 times more massive than its famous counterpart.

    The international team of astronomers observed the white dwarf WD 1425+540, about 170 light-years from Earth in the constellation Boötes
    (the Herdsman). While studying the white dwarf’s atmosphere using both the NASA/ESA Hubble Space Telescope and the W. M. Keck Observatory
    the team found evidence that an object rather like a massive comet was falling onto the star, getting tidally disrupted while doing so.

    VIRGO
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    Astronomers find faintest early galaxies yet, probe how the early universe lit up
    https://phys.org/news/2017-02-astronomers-faintest-early-galaxies-probe.html

    Astronomers at The University of Texas at Austin have developed a new technique to discover the faintest galaxies yet seen
    in the early universe —10 times fainter than any previously seen. These galaxies will help astronomers probe a little-understood,
    but important period in cosmic history. Their new technique helps probe the time a billion years after the Big Bang, when the early,
    dark universe was flooded with light from the first galaxies.

    VIRGO
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    30 years later, supernova 1987A is still sharing secrets | Science News
    https://www.sciencenews.org/article/30-year-anniversary-supernova-1987a

    Ian Shelton was alone at a telescope in the remote Atacama Desert of Chile. After three hours getting a picture
    of the Large Magellanic Cloud, a wispy galaxy that orbits the Milky Way, he was plunged into darkness. High winds
    had taken hold of the rolltop door in the observatory’s roof, slamming it shut.

    “This was maybe telling me I should just call it a night,” says Shelton, who was a telescope operator at Las Campanas
    Observatory on that evening of February 23, 1987.

    He grabbed the photograph — an 8-by-10 inch glass plate — and headed off to the darkroom (yes, these were the days
    of developing images by hand). As a quick quality check, he compared the just-developed picture with an image he had
    taken the previous night.

    VIRGO
    VIRGO --- ---
    +2
    https://www.nasa.gov/feature/nasa-receives-science-report-on-europa-lander-concept
    A report on the potential science value of a lander on the surface of Jupiter’s icy moon Europa has been delivered
    to NASA, and the agency is now engaging the broader science community to open a discussion about its findings.

    http://photojournal.jpl.nasa.gov/jpeg/PIA21048.jpg

    VIRGO
    VIRGO --- ---
    Mars 2020 Rover's Landing Site Will Undergo Hot Debate This Week - Seeker
    http://www.seeker.com/...s-2020-nasa-rover-workshop-life-hunting-habitable-locations-2245694916.html

    Eight potential locations will be studied only three or four will be prioritized for exploration by NASA's next rover mission to the Red Planet.
    VIRGO
    VIRGO --- ---
    +1
    Protostar displays a strange geometry
    https://phys.org/news/2017-02-protostar-strange-geometry.html

    Using observations of molecules in the protostar L1527 taken by the ALMA observatory in northern Chile, a group of researchers
    have uncovered new clues to understanding how dust in a collapsing molecular cloud can shed angular momentum and penetrate beyond
    an area known as the 'centrifugal barrier' to find its way to the surface of the forming star.

    VIRGO
    VIRGO --- ---
    +1
    https://www.nasa.gov/image-feature/jpl/pia11176/a-recent-cluster-of-impacts

    The dark spots in this enhanced-color infrared image are the recent impact craters that occurred in the Tharsis region between 2008 and 2014. These impact craters were
    first discovered by the Mars Context Camera (or CTX, also onboard the Mars Reconnaissance Orbiter) as a cluster of dark spots. The meteoroid that formed these craters
    must have broken up upon atmospheric entry and fragmented into two larger masses along with several smaller fragments, spawning at least twenty or so smaller impact craters.

    VIRGO
    VIRGO --- ---
    https://www.nasa.gov/...asa-finds-planets-of-red-dwarf-stars-may-face-oxygen-loss-in-habitable-zones

    The search for life beyond Earth starts in habitable zones, the regions around stars where conditions could potentially allow liquid water –
    which is essential for life as we know it – to pool on a planet’s surface. New NASA research suggests some of these zones might not actually
    be able to support life due to frequent stellar eruptions – which spew huge amounts of stellar material and radiation out into space – from
    young red dwarf stars.

    Now, an interdisciplinary team of NASA scientists wants to expand how habitable zones are defined, taking into account the impact of stellar
    activity, which can threaten an exoplanet’s atmosphere with oxygen loss. This research was published in The Astrophysical Journal Letters
    on Feb. 6, 2017.

    Planets of Red Dwarf Stars May Face Oxygen Loss in Habitable Zones
    https://www.youtube.com/watch?v=_1I5LJndjjU
    VIRGO
    VIRGO --- ---
    1 odpověď+3
    http://physicstoday.scitation.org/do/10.1063/PT.5.7345/full/
    A silicon carbide circuit lasted more than three weeks in a laboratory simulation of the caustic conditions that prevail on the planet’s surface.

    VIRGO
    VIRGO --- ---
    VIRGO: The major fireball over Wisconsin was an asteroidal fragment,
    ~2 feet Ø, lower limit energy at ~10 tons of TNT

    Major fireball Northwest of Chicago, Feb 6, 2017
    https://www.youtube.com/watch?v=x-apyBu1ZxY
    VIRGO
    VIRGO --- ---
    +2
    Space in Images - 2017 - 02 - Shedding star
    http://www.esa.int/spaceinimages/Images/2017/02/Shedding_star

    This luminous star, AG Carinae, is losing mass at a phenomenal rate. Its powerful winds reach up to
    seven million km/hour, and exert enormous pressure on the clouds of material already expelled by the star.

    VIRGO
    VIRGO --- ---
    A Massive Galaxy Long Ago and Far Awaysu201705 | www.cfa.harvard.edu/
    https://www.cfa.harvard.edu/news/su201705

    CfA astronomers Charlie Conroy and Jieun Choi and eight colleagues used the spectrometer on the Keck telescope
    (along with some secondary datasets) to obtain very sensitive magnesium measurements in one of the most massive
    and luminous elliptical galaxies known. The galaxy, seen at an epoch only three billion years after the big bang,
    has a stellar mass of about three hundred billion solar-masses (the Milky Way’s stellar mass is about ten times
    less) but is currently making stars at a rate only about half that of the Milky Way. However, it's magnesium-to-
    iron ratio indicates that earlier in its life it was making stars at a phenomenally high rate, perhaps as many
    as several thousand solar-masses each year, making it one of the most vigorous examples of star-formation known.

    VIRGO
    VIRGO --- ---
    Researchers discover a black hole feeding frenzy that breaks records
    https://phys.org/news/2017-02-black-hole-frenzy.html

    A giant black hole ripped apart a nearby star and then continued to feed off its remains for close to a decade, according to research
    led by the University of New Hampshire. This black hole meal is more than 10 times longer than any other previous episode of a star's death.

    "We have witnessed a star's spectacular and prolonged demise," said Dacheng Lin, a research scientist at UNH's Space Science Center and
    the study's lead author. "Dozens of these so-called tidal disruption events have been detected since the 1990s, but none that remained bright
    for nearly as long as this one."

    VIRGO
    VIRGO --- ---
    +1
    Když hvězdy vybuchují | ESO Česko
    http://www.eso.org/public/czechrepublic/images/potw1706a/

    Ve vzdálenosti větší než 75 milionů světelných let v souhvězdí Panny (Virgo) leží NGC 4981 - spirální galaxie s poněkud explozivní minulostí.

    NGC 4981 byla objevena sedmnáctého dubna 1784 Williamem Herschelem a později zdokumentována v katalogu NGC (New General Catalogue) Johna Dreyera.
    O více než století, dvacátého třetího dubna 1968, se galaxie znovu dostala do zpráv, když v ní vybuchla supernova typu Ia (hvězdná exploze v
    dvojhvězdném systému) jménem SN 1968l. O několik desetiletí později kolaps jádra masivní hvězdy vedl k supernově SN 2007c.

    Krásný záběr NGC 4981 - bez žádného výbuchu supernovy; jasná hvězda na obrázka je hvězda v popředí - byl pořízen přístrojem FORS (FOcal Reducer
    and low dispersion Spectrograph), který pracuje ve viditelné a blízké ultrafialové oblasti na dalekohledu ESO VLT (Very Large Telescope). FORS
    je mezi přístroji ESO švýcarským armádním nožem - dokáže studovat mnoho různých astronomických objektů různými způsoby a je zodpovědný za mnoho
    ikonických fotografií pořízených pomocí VLT (viz např. eso9948f a eso0202a).

    VIRGO
    VIRGO --- ---
    +2
    Wonderful sand dunes captured by Left & Right Navcam on Sol 1601 (Feb 6).
    Nice birthday present to Curio´s 1600-th Sol!

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