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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
    VIRGO --- ---
    Ve svitu Venuše | ESO Česko
    https://www.eso.org/public/czechrepublic/images/potw1808a/?lang

    Obrázek, který pořídil fotovyslanec ESO Petr Horálek, ukazuje planetu Venuši jasně zářící nad observatoří ESO Paranal v Chile. Zobrazený dalekohled je
    pomocný dalekohled VLT (AT1), který už je otevřený a během soumraku se připravuje na pozorování nočního nebe. To se zatím halí do odstínů modré a oranžové.

    VIRGO
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    http://www.news.gatech.edu/...8/02/17/asteroid-time-capsules-may-help-explain-how-life-started-earth

    In popular culture, asteroids play the role of apocalyptic threat, get blamed for wiping out the dinosaurs – and offer an extraterrestrial source for mineral mining.

    But for researcher Nicholas Hud, asteroids play an entirely different role: that of time capsules showing what molecules originally existed in our solar system.
    Having that information gives scientists the starting point they need to reconstruct the complex pathway that got life started on Earth.

    Director of the NSF-NASA Center for Chemical Evolution at the Georgia Institute of Technology, Hud says finding molecules in asteroids provides the strongest evidence
    that such compounds were present on the Earth before life formed. Knowing what molecules were present helps establish the initial conditions that led to the formation
    of amino acids and related compounds that, in turn, came together to form peptides, small protein-like molecules that may have kicked off life on this planet.

    VIRGO
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    +3
    Poznamenejte si do kalendáře:

    Elon Musk’s Tesla will have a close encounter with Earth in 2091 – Spaceflight Now
    https://spaceflightnow.com/...02/14/elon-musks-tesla-will-have-a-close-encounter-with-earth-in-2091/

    Even though it doesn’t obey any earthly speed limit and has a space-suited mannequin for a driver, Elon Musk’s Tesla Roadster won’t drive up his insurance rates anytime soon.
    Researchers say the sports car won’t have a really close encounter with Earth until 2091 and could last millions of years before getting totaled in a planetary crackup.

    But constant exposure to space radiation, micrometeoroid impacts and extreme temperatures will take their toll and the Roadster’s resale value likely will take a beating.
    But that’s another story.

    VIRGO
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    Hurá!!

    https://www.nasa.gov/...siting-exoplanet-survey-satellite-arrives-at-kennedy-space-center-for-launch

    NASA’s next planet-hunting mission has arrived in Florida to begin preparations for launch. The Transiting Exoplanet Survey Satellite
    (TESS) is scheduled to launch on a SpaceX Falcon 9 rocket from Cape Canaveral Air Force Station nearby NASA’s Kennedy Space Center in
    Florida no earlier than April 16, pending range approval. TESS was delivered Feb. 12 aboard a truck from Orbital ATK in Dulles, Virginia,
    where it spent 2017 being assembled and tested. Over the next month, the spacecraft will be prepped for launch at Kennedy’s Payload
    Hazardous Servicing Facility (PHSF).

    VIRGO
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    3D NASA animation shows an old theory from Leiden - Leiden University
    https://www.universiteitleiden.nl/en/news/2018/02/3d-nasa-animation-shows-old-theory-from-leiden

    When professor Frank Israel graduated at Leiden Observatory some forty years ago, little did he know that one
    of his theories would be making headlines in 2018 - in the form of a 3D animation on the Internet, no less.

    He found that the vast majority of gaseous nebulae in the Milky Way came into being by the formation of extremely luminous stars on the outher surface of these large,
    dark clouds. After their formation, these stars ionise their environment, which up until that point had been neutral. The ionisation front digs into the cloud as it grows,
    causing a pressure differential with the thin, rarefied gas outside the cloud. The ionised gas rushes outward, moving far faster than the stars that illuminate it.

    Flight Through the Orion Nebula in Visible and Infrared Light [Ultra HD]
    https://www.youtube.com/watch?v=07dve0EnUX8
    VIRGO
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    Supermassive black hole simulation predicts characteristic light signals at cusp of collision - RIT News
    http://www.rit.edu/news/story.php?id=65829

    A new simulation of supermassive black holes—the behemoths at the centers of galaxies—uses a realistic scenario to predict
    the light signals emitted in the surrounding gas before the masses collide, said Rochester Institute of Technology researchers.

    RIT density contours
    https://www.youtube.com/watch?v=dKuMPuW-Pc4


    The RIT-led study represents the first step toward predicting the approaching merger of supermassive black holes using the two channels
    of information now available to scientists—the electromagnetic and the gravitational wave spectra—known as multimessenger astrophysics.
    The findings appear in the paper “Quasi-periodic Behavior of Mini-disks in Binary Black Holes Approaching Merger,” published in
    the Astrophysical Journal Letters.

    VIRGO
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    +2
    https://www.icrar.org/cosmic-collision/

    Astronomers have discovered that our nearest big neighbour, the Andromeda galaxy, is roughly the same size as the Milky Way.

    It had been thought that Andromeda was two to three times the size of the Milky Way, and that our own galaxy would ultimately
    be engulfed by our bigger neighbour. But the latest research, published today, evens the score between the two galaxies.

    VIRGO
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    https://www.nasa.gov/feature/goddard/2018/hubble-sees-neptunes-mysterious-shrinking-storm

    Three billion miles away on the farthest known major planet in our solar system, an ominous, dark storm – once big enough to stretch across
    the Atlantic Ocean from Boston to Portugal – is shrinking out of existence as seen in pictures of Neptune taken by NASA’s Hubble Space Telescope.

    Hubble Watches Neptune’s Dark Storm Die
    https://www.youtube.com/watch?v=iKHtx5y6C4M
    VIRGO
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    University of Leeds | News > Science > New models give insight into the heart of the Rosette Nebula
    http://www.leeds.ac.uk/.../article/4183/new_models_give_insight_into_the_heart_of_the_rosette_nebula

    New research, led by the University of Leeds, offers an explanation for the discrepancy between the size and age of the Rosetta Nebula’s central cavity and that of its central stars.

    The Rosette Nebula in the Milky Way Galaxy, roughly 5,000 light-years from Earth, is known for its rose-like shape and distinctive hole at its centre. The nebula is an interstellar cloud
    of dust, hydrogen, helium and other ionised gases with several massive stars found in a cluster at its heart. Stellar winds and ionising radiation from these massive stars affect the shape
    of the giant molecular cloud. But the size and age of the cavity observed in the centre of Rosette Nebula is too small when compared to the age of its central stars — something that has
    puzzled astronomers for decades.

    VIRGO
    VIRGO --- ---
    +4
    ESOcast 152 Light: ESO’s VLT Working as Single Huge Telescope for First Time (4K UHD)
    https://www.youtube.com/watch?v=VgzzqFXenJ4


    Dalekohledy VLT mohou pracovat jako jeden teleskop o průměru 16 metrů | ESO Česko
    http://www.eso.org/public/czechrepublic/news/eso1806/?lang

    Přístroj ESPRESSO poprvé zachytil světlo ze všech čtyř hlavních teleskopů systému VLT pracujících na observatoři ESO/Paranal v Chile. Kombinace světla
    získaného současně čtveřicí dalekohledů s primárními zrcadly o průměru 8,2 m učinila z VLT optický teleskop s největší sběrnou plochou na světě.

    VIRGO
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    An X-ray Camera that can Resolve Tens of Thousands of X-ray Colors | Science Mission Directorate
    https://science.nasa.gov/...chnology-stories/x-ray-camera-resolves-tens-of-thousands-of-x-ray-colors

    NASA is part of an international team developing a cutting edge microcalorimeter X-ray camera that will provide extraordinarily detailed information
    about energetic cosmic phenomena. An X-ray microcalorimeter is a non-dispersive spectrometer that uses an equilibrium approach to energy measurement—
    the energy of an X-ray photon heats an isolated thermal mass, and the temperature change is measured. With each improvement, new mission concepts
    are developed that require even larger arrays.

    VIRGO
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    Are We Really Missing Small Galaxies?
    http://aasnova.org/2018/02/12/are-we-really-missing-small-galaxies/

    One long-standing astrophysical puzzle is that of so-called “missing” dwarf galaxies: the number of small dwarf galaxies that we
    observe is far fewer than that predicted by theory. New simulations, however, suggest that perhaps there’s no mystery after all.

    VIRGO
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    +1
    Dark Energy: A New Assignment for a 45-Year-Old Telescope
    http://newscenter.lbl.gov/...g-the-dark-energy-mystery-a-new-assignment-for-a-45-year-old-telescope/

    Berkeley Lab scientists prepare for the installation of the Dark Energy Spectroscopic Instrument in Arizona

    The Life of a Lens: Chronicling the Creation of a Single Lens for DESI
    https://www.youtube.com/watch?v=4u1CMwRUDrI


    Forty-five years ago this month, a telescope tucked inside a 14-story, 500-ton dome atop a mile-high peak in Arizona took in the night sky for the first time and recorded
    its observations in glass photographic plates. Today, the dome closes on the previous science chapters of the 4-meter Nicholas U. Mayall Telescope so that it can prepare for its
    new role in creating the largest 3-D map of the universe. This map could help to solve the mystery of dark energy, which is driving the accelerating expansion of the universe.

    The temporary closure sets in motion the largest overhaul in the telescope’s history and sets the stage for the installation of the Dark Energy Spectroscopic Instrument (DESI),
    which will begin a five-year observing run next year at the National Science Foundation’s Kitt Peak National Observatory – part of the National Optical Astronomy Observatory.

    VIRGO
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    +1
    R.I.P.
    Joseph Polchinski, 63, Leading Theorist on Multiple Universes, Dies - The New York Times
    https://www.nytimes.com/...ies/joseph-polchinski-63-leading-theorist-on-multiple-universes-dies.html

    Joseph Polchinski, one of the most creative physicists of his generation, whose work helped lay the mathematical foundation for the controversial proposition that
    our universe is only one in an almost endless assemblage that cosmologists call the “multiverse,” died on Friday at his home in Santa Barbara, Calif. He was 63.

    His death was announced by the University of California, Santa Barbara, where he was a longtime professor and a permanent member of the Kavli Institute for
    Theoretical Physics. He had been treated for brain cancer since late 2015.

    VIRGO
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    (OLD) Flyby of 2018 CB
    https://www.youtube.com/watch?time_continue=1&v=DZ1C4J44SWc


    Asteroid 2018 CB Zips by Earth Friday: Watch it Online - Sky & Telescope
    http://www.skyandtelescope.com/astronomy-news/asteroid-2018-cb-graze-earth-friday-watch-online/

    A newly-discovered asteroid passes just 44,000 miles from Earth Friday. You can watch it from the comfort of your home.

    Potentially hazardous and near-Earth asteroids zing through Earth's neighborhood nearly every day. Since the weekend, seven small asteroids —
    including two potentially hazardous ones — came within 0.5 to 16 times the distance of the Moon. The largest, 2002 AJ29, was all of 2,100 feet
    (640 meters) across. The work week ends with an exceptionally close approach of asteroid 2018 CB, which will skim just 44,000 miles past Earth
    around 5 p.m. Eastern Time (22:00 UT) Friday, February 9th.

    VIRGO
    VIRGO --- ---
    https://www.nasa.gov/image-feature/goddard/2018/hubbles-lonely-firework-display

    Roughly 50 million light-years away lies a somewhat overlooked little galaxy named NGC 1559. Pictured here by Hubble’s Wide Field Camera 3,
    this barred spiral lies in the little-observed southern constellation of Reticulum (the Reticule).

    NGC 1559 has massive spiral arms chock-full of star formation, and is receding from us at a speed of about 808 miles per second (1,300 kilometers per second).
    The galaxy contains the mass of around ten billion suns — while this may sound like a lot, it is over 20 times less massive than the Milky Way. Although NGC 1559
    appears in the sky near one of our closest galaxy neighbors, the Large Magellanic Cloud (LMC), this is just a trick of perspective. In reality, NGC 1559 is
    physically nowhere near the LMC in space — in fact, it truly is a loner, lacking the company of any nearby galaxies or membership of any galaxy cluster.

    VIRGO
    VIRGO --- ---
    ESA Science & Technology: Leaky atmosphere linked to lightweight planet
    http://sci.esa.int/mars-express/59972-leaky-atmosphere-linked-to-lightweight-planet/

    The Red Planet's low gravity and lack of magnetic field makes its outermost atmosphere an easy target to be swept away by the solar
    wind, but new evidence from ESA's Mars Express spacecraft shows that the Sun's radiation may play a surprising role in its escape.

    VIRGO
    VIRGO --- ---
    +3
    Nádhera!
    https://www.nasa.gov/feature/new-horizons-captures-record-breaking-images-in-the-kuiper-belt

    NASA’s New Horizons spacecraft recently turned its telescopic camera toward a field of stars, snapped an image – and made history.

    The routine calibration frame of the “Wishing Well” galactic open star cluster, made by the Long Range Reconnaissance Imager (LORRI) on Dec. 5, was taken when New
    Horizons was 3.79 billion miles (6.12 billion kilometers, or 40.9 astronomical units) from Earth – making it, for a time, the farthest image ever made from Earth.

    New Horizons was even farther from home than NASA’s Voyager 1 when it captured the famous “Pale Blue Dot” image of Earth. That picture was part of a composite of 60
    images looking back at the solar system, on Feb. 14, 1990, when Voyager was 3.75 billion miles (6.06 billion kilometers, or about 40.5 astronomical units [AU]) from
    Earth. Voyager 1’s cameras were turned off shortly after that portrait, leaving its distance record unchallenged for more than 27 years.

    LORRI broke its own record just two hours later with images of Kuiper Belt objects 2012 HZ84 and 2012 HE85 – further demonstrating how nothing stands still when
    you’re covering more than 700,000 miles (1.1 million kilometers) of space each day.

    VIRGO
    VIRGO --- ---
    Are you rocky or are you gassy? Carnegie astronomers help unlock the mysteries of super-Earths | Carnegie Institution for Science
    https://carnegiescience.edu/node/2293

    A star about 100 light years away in the Pisces constellation, GJ 9827, hosts what may be one of the most massive and dense
    super-Earth planets detected to date according to new research led by Carnegie’s Johanna Teske. This new information provides
    evidence to help astronomers better understand the process by which such planets form.

    Teske Whiteboard
    https://www.youtube.com/watch?time_continue=1&v=n-QTe21du-0
    VIRGO
    VIRGO --- ---
    +1
    https://www.nasa.gov/feature/jpl/tiny-crystal-shapes-get-close-look-from-mars-rover

    Star-shaped and swallowtail-shaped tiny, dark bumps in fine-layered bright bedrock of a Martian ridge are drawing close inspection by NASA's Curiosity Mars rover.

    This set of shapes looks familiar to geologists who have studied gypsum crystals formed in drying lakes on Earth, but Curiosity's science team is considering multiple
    possibilities for the origin of these features on "Vera Rubin Ridge" on Mars.

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