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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
    VIRGO --- ---
    +1
    Storms of Saturn's north hemisphere, captured by Cassini on March 28, 2017 / MT2,MT3,CB2 filters.

    VIRGO
    VIRGO --- ---
    +1
    Attempting the Impossible: Taking the First Picture of a Black Hole
    http://www.almaobservatory.org/...attempting-the-impossible-taking-the-first-picture-of-a-black-hole

    The Atacama Large Millimeter/submillimeter Array (ALMA) joins for the first time the Global mm-VLBI Array (GMVA) and the Event Horizon Telescope (EHT),
    Earth-sized virtual observatories, which are made possible by an international collaboration of radio telescopes. One of the main drivers of this global
    collaboration is to study in detail the supermassive black hole at the center of our Milky Way. The GMVA will derive the properties of the accretion and
    outflow in the immediate surroundings of the Galactic Center, while the EHT will aim at imaging, for the very first time, the shadow of the black hole’s
    event horizon.

    The impressive line-up of participating telescopes stretch across the globe, from the South Pole to Europe to Hawaii, and, of course, Chile. ALMA with its
    66 antennas, state-of-the-art receivers, its excellent site and southern location make it the largest and most sensitive, as well as a strategic component
    of both the GMVA and EHT. The observations will be done with the GMVA from April 1 to April 4, 2017, and with the EHT from April 5 to April 14, 2017.
    VIRGO
    VIRGO --- ---
    Myslel jsem si, že nový G+ irituje jen mě (protože se neúčastním uživatelských debat),
    ale teď vidím, že nejsem sám. Vypadá to, jako kdyby to provozovatele už tak prudilo,
    že děljí vše proto, aby lidi odtáhli jinam...

    Black Hole Gets Kicked Around by Gravitational Waves Pt.2
    https://www.youtube.com/watch?v=OmKgUtBj-Cw
    JULIANNE
    JULIANNE --- ---
    +2
    Příští čtvrtek budeme mít geofyziku terestrických planet. Záznam z tohohle týdne (Raman) se objeví brzy.

    https://www.facebook.com/events/755382297955337/
    VIRGO
    VIRGO --- ---
    https://www.nasa.gov/...ure/goddard/2017/wispy-remains-of-supernova-explosion-hide-possible-survivor

    Of all the varieties of exploding stars, the ones called Type Ia are perhaps the most intriguing. Their predictable brightness lets astronomers
    measure the expansion of the universe, which led to the discovery of dark energy. Yet the cause of these supernovae remains a mystery. Do they
    happen when two white dwarf stars collide? Or does a single white dwarf gorge on gases stolen from a companion star until bursting?

    If the second theory is true, the normal star should survive. Astronomers used NASA's Hubble Space Telescope to search the gauzy remains of
    a Type Ia supernova in a neighboring galaxy called the Large Magellanic Cloud. They found a sun-like star that showed signs of being associated
    with the supernova. Further investigations will be needed to learn if this star is truly the culprit behind a white dwarf's fiery demise.

    This image, taken with NASA's Hubble Space Telescope, shows the supernova remnant SNR 0509-68.7, also known as N103B. It is located 160,000
    light-years from Earth in a neighboring galaxy called the Large Magellanic Cloud. N103B resulted from a Type Ia supernova, whose cause remains
    a mystery. One possibility would leave behind a stellar survivor, and astronomers have identified a possible candidate.

    The actual supernova remnant is the irregular shaped dust cloud, at the upper center of the image. The gas in the lower half of the image and
    the dense concentration of stars in the lower left are the outskirts of the star cluster NGC 1850.

    The Hubble image combines visible and near-infrared light taken by the Wide Field Camera 3 in June 2014.

    SNR 0509-68.7
    https://www.youtube.com/watch?v=mOXzSx-M6Vs
    VIRGO
    VIRGO --- ---
    +1
    Explaining the accelerating expansion of the universe without dark energy
    http://www.ras.org.uk/...8-explaining-the-accelerating-expansion-of-the-universe-without-dark-energy

    Enigmatic 'dark energy', thought to make up 68% of the universe, may not exist at all, according to a Hungarian-American team.
    The researchers believe that standard models of the universe fail to take account of its changing structure, but that once
    this is done the need for dark energy disappears. The team publish their results in a paper in Monthly Notices of RAS.

    https://www.youtube.com/watch?v=VF0Lg7CfCYA
    VIRGO
    VIRGO --- ---
    Speeding star gives new clues to breakup of multi-star system
    https://phys.org/news/2017-03-star-clues-breakup-multi-star.html

    A remarkable new discovery using NASA's Hubble Space Telescope reveals three stars that now hold the record as the youngest-known examples
    of a super-fast-flying breed. "Until these observations, only a few—but older—examples of such rapidly-moving stars had been found with origins
    traceable back to the volatile systems that likely ejected them," said lead researcher Kevin Luhman of Penn State University. "The new Hubble
    observations provide very strong evidence that these three stars were ejected from an unstable multi-star system." The new discovery is
    published in this month's Astrophysical Journal Letters.

    VIRGO
    VIRGO --- ---
    Mysterious cosmic explosion surprises astronomers studying the distant X-ray universe
    https://phys.org/news/2017-03-mysterious-cosmic-explosion-astronomers-distant.html

    Scientists have discovered a mysterious flash of X-rays using NASA’s Chandra X-ray Observatory, in the deepest X-ray image ever
    obtained. The X-ray source is located in a region of the sky known as the Chandra Deep Field-South. Over the 17 years Chandra has
    been operating, the telescope has observed this field many times, resulting in an exposure time equivalent to 7 million seconds.

    A Tour of CDF-S Transient XT1
    https://www.youtube.com/watch?v=0YyGndzA_O0


    VIRGO
    VIRGO --- ---
    +2
    125-Fold Time-Lapsed Perijove-04 Fly-Over Animation Derived from Raw JunoCam Images, 2017-02-02
    https://www.youtube.com/watch?v=xiNJAhWqvHI
    VIRGO
    VIRGO --- ---
    YaleNews | Finding a ‘lost’ planet, about the size of Neptune
    http://news.yale.edu/2017/03/29/finding-lost-planet-about-size-neptune

    Yale astronomers have discovered a “lost” planet that is nearly the size of Neptune and tucked away in a solar system 3,000 light years from Earth.

    The new planet, Kepler-150 f, was overlooked for several years. Computer algorithms identify most such “exoplanets,” which are planets located outside our
    solar system. The algorithms search through data from space mission surveys, looking for the telltale transits of planets orbiting in front of distant stars.

    But sometimes the computers miss something. In this case, it was a planet in the Kepler-150 system with a long orbit around its sun. Kepler-150 f takes 637
    days to circle its sun, one of the longest orbits for any known system with five or more planets. The Kepler Mission found four other planets in the Kepler-150
    system — Kepler-150 b, c, d, and e — several years ago. All of them have orbits much closer to their sun than the new planet does.
    VIRGO
    VIRGO --- ---
    Inventing Tools for Detecting Life Elsewhere | Caltech
    http://www.caltech.edu/news/inventing-tools-detecting-life-elsewhere-54515
    Caltech astronomers develop new strategy for future telescopes

    Recently, astronomers announced the discovery that a star called TRAPPIST-1 is orbited by seven Earth-size planets.
    Three of the planets reside in the "habitable zone," the region around a star where liquid water is most likely to
    exist on the surface of a rocky planet. Other potentially habitable worlds have also been discovered in recent years,
    leaving many people wondering: How do we find out if these planets actually host life?

    At Caltech, in the Exoplanet Technology Laboratory, or ET Lab, of Associate Professor of Astronomy Dimitri Mawet,
    researchers have been busy developing a new strategy for scanning exoplanets for biosignatures—signs of life such
    as oxygen molecules and methane. These chemicals—which don't naturally stick around for long because they bind with
    other chemicals—are abundant on Earth largely thanks to the living creatures that expel them. Finding both of these
    chemicals around another planet would be a strong indicator of the presence of life.

    VIRGO
    VIRGO --- ---
    Ještě k loňskému tématu marsovských tsunami:
    New study shows how impacts generated Martian tsunamis - GeoSpace - AGU Blogosphere
    http://blogs.agu.org/geospace/2017/03/29/new-study-shows-impacts-generated-martian-tsunamis/

    Simulation of a tsunami on Mars
    https://www.youtube.com/watch?v=2xDC9ecSBgU
    VIRGO
    VIRGO --- ---
    +3
    Space Images | A Decade of Compiling the Sharpest Mars Map
    https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA21487

    The Context Camera (CTX) on NASA's Mars Reconnaissance Orbiter (MRO) has been taking images of Mars for more than 10 years, sharp enough
    to show the shapes of features as small as a tennis court. The compiled images from CTX now cover more than 99 percent of Mars.

    No other camera has ever shown us so much of Mars in such high resolution.

    This animation tracks how the coverage accumulated over the period from late 2006 to early 2017 to form a nearly complete map of Mars.
    Each frame adds the locations of one month's worth of CTX observations.

    VIRGO
    VIRGO --- ---
    Finally, some details about how NASA actually plans to get to Mars | Ars Technica
    https://arstechnica.com/...the-first-time-nasa-has-begun-detailing-its-deep-space-exploration-plans/

    VIRGO
    VIRGO --- ---
    VIRGO:
    Cassini - Final Orbits
    https://www.youtube.com/watch?v=XA58drPb5l8
    VIRGO
    VIRGO --- ---
    Asteroid 2017 FJ101 to flyby Earth at 0.83 LD
    https://watchers.news/2017/03/29/asteroid-2017-fj101/

    A newly discovered asteroid designated 2017 FJ101 will flyby Earth at a distance of 0.83 LD (~318 720 km) from the surface
    of our planet on Thursday, March 30, 2017. This is the 13th asteroid to flyby Earth within 1 lunar distance since January 9.

    Asteroid 2017 FJ101 to flyby Earth on Thursday,. Space News.
    https://www.youtube.com/watch?v=m2jocqZ_OHI
    VIRGO
    VIRGO --- ---
    +1
    P5, Roman Tkačenko (vpravo Io a Europa)

    VIRGO
    VIRGO --- ---
    +5
    Hustá údržba...

    VIRGO
    VIRGO --- ---
    +4
    When Kodak Accidentally Discovered A-Bomb Testing
    http://www.popularmechanics.com/...rgy/a21382/how-kodak-accidentally-discovered-radioactive-fallout/
    Two thousand miles away from the U.S. A-bomb tests in 1945, something weird was happening to Kodak's film.

    The ground shook, a brilliant white flash enveloped the sky, and the world changed forever. Code name "Trinity," the bomb test at dawn on July 16, 1945
    in Alamogordo, New Mexico was the first large-scale atomic weapons testing in history. Only three weeks later two atomic bombs were dropped on Japan.

    More than 1,900 miles away from Alamogordo, at the Rochester, NY headquarters of Eastman Kodak, a flood of complaints came in from business customers
    who had recently purchased sensitive X-ray film from the company. Black exposed spots on the film, or "fogging," had rendered it unusable. This perplexed
    many Kodak scientists, who had gone to great lengths to prevent contaminations like this.

    VIRGO
    VIRGO --- ---
    +2
    Juno’s Latest Flight Over Jupiter’s South Pole | Lights in the Dark
    https://lightsinthedark.com/2017/03/29/junos-latest-flight-over-jupiters-south-pole/

    On Monday, March 27, at 4:52 a.m. EDT (08:52 UTC) NASA’s Juno spacecraft made its fifth close pass of Jupiter,
    passing about 4,400 km above the planet’s clouds while traveling at a relative speed of 57.8 kilometers per second.
    The images above, captured with the JunoCam instrument, show the giant planet’s south pole during this P5 pass.

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