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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
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    TONIGHT: Cassini mission experts live at 22:00 CEST as they talk about the Grand Finale:

    NASA JPL Live - YouTube
    https://www.youtube.com/NASAJPL/live

    VIRGO
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    The empty primordial asteroid belt | Science Advances
    http://advances.sciencemag.org/content/3/9/e1701138.full

    The asteroid belt contains less than a thousandth of Earth’s mass and is radially segregated, with S-types dominating the inner belt and C-types the outer belt.
    It is generally assumed that the belt formed with far more mass and was later strongly depleted. We show that the present-day asteroid belt is consistent with
    having formed empty, without any planetesimals between Mars and Jupiter’s present-day orbits. This is consistent with models in which drifting dust is concentrated
    into an isolated annulus of terrestrial planetesimals. Gravitational scattering during terrestrial planet formation causes radial spreading, transporting
    planetesimals from inside 1 to 1.5 astronomical units out to the belt.

    VIRGO
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    Star formation influenced by local environmental conditions – Niels Bohr Institute - University of Copenhagen
    http://www.nbi.ku.dk/...ish/news/news17/star-formation-influenced-by-local-environmental-conditions/

    STAR FORMATION: Three scientists at Niels Bohr Institute (NBI), University of Copenhagen, have carried out extensive computer simulations related
    to star formation. They conclude that the present idealized models are lacking when it comes to describing details in the star formation process.
    “Hopefully our results can also help shed more light on planet formation”, says Michael Küffmeier, astrophysicist and head of the research team.

    VIRGO
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    +6
    Krása...
    The Big Bang by Glenna Burmer
    https://www.youtube.com/watch?v=7RduEjCaqX0
    VIRGO
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    Researchers create first global map of water in Moon’s soil | News from Brown
    http://news.brown.edu/articles/2017/09/moonwater

    A new study maps the trace concentrations of water implanted in the lunar soil by the solar wind, a water source that could be used as resource in future lunar exploration.

    VIRGO
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    +2
    News | NASA's Curiosity Mars Rover Climbing Toward Ridge Top
    https://www.jpl.nasa.gov/news/news.php?feature=6946

    NASA's Mars rover Curiosity has begun the steep ascent of an iron-oxide-bearing ridge
    that's grabbed scientists' attention since before the car-sized rover's 2012 landing.

    "Vera Rubin Ridge" stands prominently on the northwestern flank of Mount Sharp, resisting erosion better than the less-steep portions of the mountain
    below and above it. The ridge, also called "Hematite Ridge," was informally named earlier this year in honor of pioneering astrophysicist Vera Rubin.

    The ascent to the top of the ridge from a transition in rock-layer appearance at the bottom of it will gain about 213 feet (65 meters) of elevation --
    about 20 stories. The climb requires a series of drives totaling a little more than a third of a mile (570 meters). Before starting this ascent in early
    September, Curiosity had gained a total of about 980 feet (about 300 meters) in elevation in drives totaling 10.76 miles (17.32 kilometers) from its
    landing site to the base of the ridge.

    VINCENT_BU
    VINCENT_BU --- ---
    VIRGO: o den se teda sekli :D
    VIRGO
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    +2
    New supernova analysis reframes dark energy debate
    http://www.ras.org.uk/news-and-press/3046-new-supernova-analysis-reframes-dark-energy-debate

    The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research published in the journal
    Monthly Notices of the Royal Astronomical Society. The new study—by a group at the University of Canterbury in Christchurch, New Zealand—finds the fit
    of Type Ia supernovae to a model universe with no dark energy to be very slightly better than the fit to the standard dark energy model.

    Dark energy is usually assumed to form roughly 70% of the present material content of the Universe. However, this mysterious quantity is essentially
    a place-holder for unknown physics.

    Current models of the Universe require this dark energy term to explain the observed acceleration in the rate at which the Universe is expanding.
    Scientists base this conclusion on measurements of the distances to supernova explosions in distant galaxies, which appear to be farther away than
    they should be if the Universe’s expansion were not accelerating.

    VIRGO
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    Plume Activity and Tidal Deformation on Enceladus Influenced by Faults and Variable Ice Shell Thickness
    http://online.liebertpub.com/doi/full/10.1089/ast.2016.1629

    Běhounková Marie, Souček Ondřej, Hron Jaroslav, and Čadek Ondřej.
    VIRGO
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    Last 24 hours for this outstanding mission. But to be more optimistic:A new NASA JPL e-book
    Cassini: The Grand Finale: The Saturn System Through the Eyes of Cassini (e-Book)
    https://saturn.jpl.nasa.gov/resources/7777/?category=graphics



    PANAAK
    PANAAK --- ---
    +1
    GW150914 2nd anniversary today!



    // calls for a big cake at least 10-23 in diameter!
    VIRGO
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    1 odpověď+6
    A jak symbolické...k dnešnímu dni v roce 1712 zemřel Giovanni Domenico Cassini ve věku 87 let.

    VIRGO
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    +1
    ACH NE.....CASSINI :-((

    VIRGO
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    Pekelný svět s titanovou oblohou | ESO Česko
    http://www.eso.org/public/czechrepublic/news/eso1729/?lang

    Pomocí dalekohledu ESO/VLT se podařilo poprvé detekovat oxid titanatý v atmosféře exoplanety

    Astronomům využívajícím dalekohled ESO/VLT se poprvé podařilo detekovat molekuly oxidu titanatého v atmosféře extrasolární planety.
    Objev u exoplanety WASP-19b, která je typu horký Jupiter, učinili vědci s pomocí výkonného zařízení FORS2. Přináší unikátní informace
    o chemickém složení, teplotě a tlaku v atmosféře tohoto neobvyklého a velmi horkého světa. Výsledky byly publikovány v prestižním
    vědeckém časopise Nature.

    ESOcast 126 Light: Titanium oxide in exoplanetary atmosphere (4K UHD)
    https://www.youtube.com/watch?v=znvXbvs2LEg


    Astronom Elyar Sedaghati (vědecký pracovník ESO, absolovent TU Berlín) a tým jeho spolupracovníků zkoumali atmosféru extrasolární planety
    WASP-19b v dosud nedostižných detailech. Tato podivuhodná planeta se velikostí podobá Jupiteru. Pohybuje se však tak blízko své mateřské
    hvězdy, že jeden oběh jí trvá pouhých 19 hodin a odhadovaná teplota atmosféry planety dosahuje až 2 000 °C.

    WASP-19b při pohledu ze Země přechází přes disk své mateřské stálice a přitom část záření hvězdy prochází atmosférou planety. Atmosféra
    ve světle zanechá jemné známky vypovídající o jejím složení. Díky použiti přístroje FORS2 a dalekohledu ESO/VLT (Very Large Telescope)
    se týmu po pečlivé analýze světla přicházejícího od hvězdy podařilo odhalit, že atmosféra exoplanety kromě všudypřítomného zákalu
    rozptylujícího procházející záření obsahuje malé množství oxidu titanatého (TiO), vody a stopy sodíku.

    VINCENT_BU
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    +3
    nevím, zda to už zde někde nebylo; odkaz na telemetrii v reálném čase "Where is Cassini now?"
    VIRGO
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    NASA JPL Live
    https://www.youtube.com/watch?v=gs-dscW95PE
    VIRGO
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    NASA Awards New Cooperative Agreement to W. M. Keck Observatory W. M. Keck Observatory
    http://www.keckobservatory.org/recent/entry/NASA_Agreement

    NASA has awarded a five-year Cooperative Agreement with the California Association for Research in Astronomy to continue the science program at the W. M. Keck Obs.

    “The Keck Observatory has unique, world-class capabilities that we consider essential to realize the scientific potential of many NASA missions, both ongoing and planned,”
    said Paul Hertz, director of the Astrophysics Division at NASA Headquarters. “NASA’s continuing partnership with Keck will ensure that astronomers and planetary scientists
    can carry out important ground-based observations necessary for the success of NASA missions and their scientific objectives.”

    The Keck Observatory is privately owned; in 1994 NASA contributed to the observatory and has been a partner ever since.

    Under the new agreement, which takes effect March 1, 2018 through February 28, 2023, Keck Observatory will support upcoming NASA missions, including:

    James Webb Space Telescope
    Transiting Exoplanet Survey Satellite (TESS)
    Wide Field Infrared Survey Telescope (WFIRST)
    Euclid (ESA)
    Mars 2020
    Explorers Program: Medium-Class Explorers (MIDEX), Small Explorers (SMEX)
    Planetary Missions: Discovery, New Frontiers

    VIRGO
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    HARPS data release #3, independent analyzes & more – Red Dots
    https://reddots.space/harps-data-release-3-independent-analyzes-more/

    This unusual Picture of the Week showcases the latest data gathered by ESO’s exoplanet hunter, the High Accuracy Radial velocity Planet Searcher (HARPS),
    during the ongoing Red Dots campaign, a search for terrestrial planets around our nearest three red dwarf stars: Proxima Centauri, Barnard’s Star, and Ross 154.
    The campaign was launched earlier in 2017 to build on the 2016 discovery of Proxima b around our nearest stellar neighbour, Proxima Centauri. Red Dots is designed
    as an open notebook science experiment, meaning the public has access to the data and can even contribute observations. Can you see a new exoplanet in these data
    of Proxima Centauri?

    VIRGO
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    Cassini - dnešní souhrn (včetně upřesnění přenosů v GMT/SELČ)

    http://www.esa.int/...ctivities/Space_Science/Cassini-Huygens/How_to_follow_Cassini_s_end_of_mission

    http://www.planetary.org/...ss-room/releases/2017/media-resources-cassini-grand-finale-coverage.html

    https://www.nasa.gov/...d/2017/excitement-and-tears-as-nasa-goddard-team-prepares-for-cassini-finale

    https://www.youtube.com/watch?v=DIE-cSGVYuI
    VIRGO
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    +2
    https://www.nasa.gov/feature/goddard/2017/keeping-nasa-s-james-webb-space-telescope-in-the-dark

    This bunny-suited technician is performing the important task of ensuring no unwanted infrared light interferes
    with the optical testing of NASA’s JWST inside of Chamber A at NASA’s Johnson Space Center in Houston.

    Because of the Webb telescope’s extreme sensitivity to infrared light, the shroud was made nearly impervious
    to outside light sources that could contaminate the testing.

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