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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 --- ---
    VIRGO: NASA’s Johnson Space Center Closes Through Labor Day for Tropical Storm Harvey
    https://www.nasa.gov/...sa-s-johnson-space-center-closes-through-labor-day-for-tropical-storm-harvey

    VIRGO
    VIRGO --- ---
    James Webb Space Telescope Surrounded by Rising Floodwaters - Scientific American
    https://www.scientificamerican.com/...e/james-webb-space-telescope-surrounded-by-rising-floodwaters/

    Isolated in a giant thermal vacuum chamber, NASA’s $8.6 billion next-generation observatory is riding out the worst of Hurricane Harvey

    As of this writing, there have been no reports of flooding at Building 32 or other critical JSC facilities, and the center possesses several
    electric generators as backup in the event of a power outage. JSC lies 13 feet above sea level at its lowest point, and 22 feet at its highest—
    making it a relatively lofty point in the surrounding landscape, much of which is already submerged beneath rising floodwaters.
    VIRGO
    VIRGO --- ---
    https://www.nasa.gov/feature/jpl/saturn-plunge-nears-for-cassini-spacecraft

    The spacecraft is expected to lose radio contact with Earth within about one to two minutes after beginning its descent into Saturn's upper atmosphere.
    But on the way down, before contact is lost, eight of Cassini's 12 science instruments will be operating. In particular, the spacecraft‘s ion and neutral
    mass spectrometer (INMS), which will be directly sampling the atmosphere's composition, potentially returning insights into the giant planet's formation
    and evolution. On the day before the plunge, other Cassini instruments will make detailed, high-resolution observations of Saturn's auroras, temperature,
    and the vortices at the planet's poles. Cassini's imaging camera will be off during this final descent, having taken a last look at the Saturn system
    the previous day (Sept. 14).

    Cassini: A Saturn Odyssey
    https://www.youtube.com/watch?v=fHaaIX-iSqM
    VIRGO
    VIRGO --- ---
    První JPL telkon začíná s mírným zpožděním (technické potíže):

    NASA JPL Live
    https://www.youtube.com/watch?v=X4fwyphQqhI


    VIRGO
    VIRGO --- ---
    https://www.nasa.gov/...nasa-team-passes-major-technological-milestone-for-characterizing-exoplanets

    NASA researchers say they have passed a major milestone in their quest to mature more powerful tools for directly detecting and analyzing the atmospheres
    of giant planets outside the solar system — one of the observational goals of NASA’s proposed Wide-Field Infrared Space Telescope, also known as WFIRST.

    In tests conducted at the High-Contrast Imaging Testbed at NASA’s Jet Propulsion Laboratory, or JPL, in Pasadena, California — one of the world’s most
    advanced testbeds of its kind — researchers created what they call a region of very deep contrast between a simulated star and its planet. They also
    demonstrated the ability to detect and analyze the planet’s faint light over a relatively large portion of the visible to near-infrared wavelength band.

    An instrument developed by scientists at NASA’s Goddard Space Flight Center in Greenbelt, Maryland — the Prototype Imaging Spectrograph for Coronagraphic
    Exoplanet Studies, or PISCES — played an important role in the demonstration, showing that it could separate light of one or more Jupiter-sized exoplanets
    by their wavelength (color) and record the data at every position around a star.

    VIRGO
    VIRGO --- ---
    10 Most Bizarre Planets You've Probably Never Heard Of - Listverse
    http://listverse.com/2017/08/28/10-most-bizarre-planets-youve-probably-never-heard-of/

    VIRGO
    VIRGO --- ---
    U of T astrophysicists convert moons and rings of Saturn into music - Arts & Science News
    http://news.artsci.utoronto.ca/all-news/saturn-sounds/

    After centuries of looking with awe and wonder at the beauty of Saturn and its rings,
    we can now listen to them, thanks to the efforts of astrophysicists at the University of Toronto.

    “To celebrate the Grand Finale of NASA’s Cassini mission next month, we converted Saturn’s moons
    and rings into two pieces of music,” says astrophysicist Matt Russo, a postdoctoral researcher at
    the Canadian Institute for Theoretical Astrophysics in the Faculty of Arts & Science at U of T.

    SATURN Sounds Part 1: Moons And Rings Translated Into Music
    https://www.youtube.com/watch?v=UGnuDE7sINI


    VIRGO
    VIRGO --- ---
    VIRGO: Likely transiting exocomets detected by Kepler
    What’s that coming over the disk? | astrobites
    https://astrobites.org/2017/08/24/whats-that-coming-over-the-disk/

    During visual inspection, the light curve of KIC 3542116, a F2-type star, was found to have three asymmetric,
    transit-like features with easy-to-spot depths of 0.1% over a period of 1 day. Further inspection revealed
    three dips of a similar shape hidden within the Kepler data that was hidden by stellar variability.
    The resulting data is shown below in figures 3 and 4.

    VIRGO
    VIRGO --- ---
    PLATO as it is: A legacy mission for Galactic archaeology - Miglio - 2017 - Astronomische Nachrichten - Wiley Online Library
    http://onlinelibrary.wiley.com/doi/10.1002/asna.201713385/full

    VIRGO
    VIRGO --- ---
    New Computational Model of Chemical Building Blocks May Help Explain the Origins of Life
    http://www.stonybrook.edu/...model-of-chemical-building-blocks-may-help-explain-the-origins-of-life/

    Scientists have yet to understand and explain how life’s informational molecules – proteins and DNA and RNA – arose from simpler chemicals
    when life on earth emerged some four billion years ago. Now a research team from the Stony Brook University Laufer Center for Physical and
    Quantitative Biology and the Lawrence Berkeley National Laboratory believe they have the answer. They developed a computational model
    explaining how certain molecules fold and bind together to grow longer and more complex, leading from simple chemicals to primitive biological
    molecules. The findings are reported early online in PNAS.
    VIRGO
    VIRGO --- ---
    As Oceans Alkalized, Life Developed Bones and Shells - Astrobiology Magazine
    http://www.astrobio.net/news-exclusive/oceans-alkalized-life-developed-bones-shells/

    VIRGO
    VIRGO --- ---
    Moon's Shadow Races Across the Clouds! Astonishing Solar Eclipse Time Lapse
    https://www.youtube.com/watch?v=13rVSwWIocE
    VINCENT_BU
    VINCENT_BU --- ---
    Z Technetu na iDnes:
    Když se vědci neudrží: astronomové zřejmě dopředu prozradili velký objev
    Nedávno zrozený obor „gravitační astronomie“ si podle zákulisních informací připsal důležitý milník: vědcům se zřejmě poprvé podařilo pozorovat stejnou událost běžným teleskopem a zároveň i detektory gravitačních vln. Co přesně viděli, zatím nevíme, ale nejspíš vznikalo zlato.
    XCHAOS
    XCHAOS --- ---
    SLAC Experiment Proves It Rains Diamonds On Uranus and Neptune - Slashdot
    https://science.slashdot.org/...32225/slac-experiment-proves-it-rains-diamonds-on-uranus-and-neptune
    VIRGO
    VIRGO --- ---
    Cassini: The Grand Finale: Cassini's 'Inside-Out' Rings Movie
    https://saturn.jpl.nasa.gov/resources/7751/

    This movie sequence of images from NASA's Cassini spacecraft offers a unique perspective on Saturn’s ring system. Cassini captured the images from within
    the gap between the planet and its rings, looking outward as the spacecraft made one of its final dives through the gap as part of the mission's Grand Finale.

    Using its wide-angle camera, Cassini took the 21 images in the sequence over a span of about four minutes during its dive through the gap on Aug. 20, 2017.
    The images have an original size of 512 x 512 pixels; the smaller image size allowed for more images to be taken over the short span of time.

    VIRGO
    VIRGO --- ---
    Astronomers let gaseous disks tilt and shrink in virtual wind tunnel - Radboud University
    http://www.ru.nl/english/news-agenda/news/vm/imapp/astrophysics/2017/gaseous-disks-wind-tunnel/

    A team of Dutch astronomers, led by Thomas Wijnen from Radboud University, has managed to tilt and shrink gaseous disks, in which planets form,
    in a virtual wind tunnel. The research helps in finding an explanation for the tilted planetary orbits in our own solar system, for example.
    Wijnen and his colleagues publish their findings in two articles in the journal Astronomy & Astrophysics.

    Tilting of a protoplanetary disc
    https://www.youtube.com/watch?v=hsEFHAoGBg0
    VIRGO
    VIRGO --- ---
    Sandia National Laboratories: News Releases : Black hole models contradicted by hands-on tests at Sandia’s Z machine
    https://share-ng.sandia.gov/news/resources/news_releases/black_hole/#.WaRlmTOg9hE

    A long-standing but unproven assumption about the X-ray spectra of black holes in space has been
    contradicted by hands-on experiments performed at Sandia National Laboratories’ Z machine.

    Z, the most energetic laboratory X-ray source on Earth, can duplicate the X-rays surrounding black
    holes that otherwise can be watched only from a great distance and then theorized about.

    “Of course, emission directly from black holes cannot be observed,” said Sandia researcher and lead
    author Guillaume Loisel, lead author for a paper on the experimental results, published in August
    in Physical Review Letters. “We see emission from surrounding matter just before it is consumed by
    the black hole. This surrounding matter is forced into the shape of a disk, called an accretion disk.”

    The results suggest revisions are needed to models previously used to interpret emissions from matter
    just before it is consumed by black holes, and also the related rate of growth of mass within the black
    holes. A black hole is a region of outer space from which no material and no radiation (that is, X-rays,
    visible light, and so on) can escape because the gravitational field of the black hole is so intense.

    VIRGO
    VIRGO --- ---
    Astronomy and Space News - Astro Watch: Proposed Astrophysics Mission to Conduct the First Infrared Spectral Survey of the Entire Sky
    http://www.astrowatch.net/2017/08/proposed-astrophysics-mission-to.html

    NASA has recently chosen six proposed astrophysics mission for concept studies. Among them is the Spectro-Photometer for the History of the Universe,
    Epoch of Reionization, and Ices Explorer, or SPHEREx, which aims to unlock the mysteries of the universe by performing the first all-sky spectral survey.

    If selected for construction and launch, the survey provided by the SPHEREx spacecraft could provide crucial insights into the origin and evolution of
    galaxies, and could help scientists explore whether planets around other stars could harbor life.

    “SPHEREx will produce the first infrared spectral survey of the entire sky. This survey will have broad applications in astronomy, providing rich spectra
    of galaxies, quasars, stars, clusters and our Galaxy. Following the wide usage of previous all-sky surveys like the Infrared Astronomical Satellite (IRAS)
    and the Wide-field Infrared Survey Explorer (WISE), SPHEREx will have a lasting value for the astronomy community,” James Bock, Principal Investigator of
    SPHEREx at the California Institute of Technology (Caltech), told Astrowatch.net.

    VIRGO
    VIRGO --- ---
    VLA Reveals Distant Galaxy’s Magnetic Field – National Radio Astronomy Observatory
    https://public.nrao.edu/news/vla-reveals-magnetic-field/

    With the help of a gigantic cosmic lens, astronomers have measured the magnetic field of a galaxy nearly five billion light-years away.
    The achievement is giving them important new clues about a problem at the frontiers of cosmology — the nature and origin of the magnetic
    fields that play an important role in how galaxies develop over time.

    The scientists used the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) to study a star-forming galaxy that lies
    directly between a more-distant quasar and Earth. The galaxy’s gravity serves as a giant lens, splitting the quasar’s image into two
    separate images as seen from Earth. Importantly, the radio waves coming from this quasar, nearly 8 billion light-years away, are
    preferentially aligned, or polarized.

    “The polarization of the waves coming from the background quasar, combined with the fact that the waves producing the two lensed images
    traveled through different parts of the intervening galaxy, allowed us to learn some important facts about the galaxy’s magnetic field,”
    said Sui Ann Mao, Minerva Research Group Leader for the Max Planck Institute for Radio Astronomy in Bonn, Germany.

    VINCENT_BU
    VINCENT_BU --- ---
    KIC 8462852 Boyajian's Star Update For 08/27/17
    https://www.youtube.com/watch?v=oZePdhNbJHA
    HADIAK
    HADIAK --- ---
    VIRGO: dik ;-)
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