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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
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    Newborns or survivors? The unexpected matter found in hostile black hole winds - Northwestern Now
    https://news.northwestern.edu/...-survivors-the-unexpected-matter-found-in-hostile-black-hole-winds/

    The existence of large numbers of molecules in winds powered by supermassive black holes at the centers of galaxies has puzzled astronomers since they were discovered more than a decade ago.
    Molecules trace the coldest parts of space, and black holes are the most energetic phenomena in the universe, so finding molecules in black hole winds was like discovering ice in a furnace.

    Astronomers questioned how anything could survive the heat of the energetic outflows, but a new theory from researchers in Northwestern University’s Center for Interdisciplinary Research and
    Exploration in Astrophysics (CIERA) predicts that these molecules are not survivors at all, but brand-new molecules, born in the winds with unique properties that enable them to adapt to and
    thrive in the hostile environment.

    The theory, published in the Monthly Notices of the Royal Astronomical Society, is the work of Lindheimer post-doctoral fellow Alexander Richings, who developed the computer code that,
    for the first time, modeled the detailed chemical processes that occur in interstellar gas accelerated by radiation emitted during the growth of supermassive black holes.

    VIRGO
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    Interstellar Fullerenes May Help Find Solutions for Earthly Matters
    https://kpfu.ru/eng/news-eng/interstellar-fullerenes.html

    A group of astronomers is currently engaged in studies of fullerenes in interstellar medium. Among them are KFU alumni Gazinur Galazutdinov (Catholic University of
    the North, Chile) and Gennady Valyavin (Special Astrophysical Observatory of the Russian Academy of Sciences) and current KFU employee, Associate Professor at the
    Department of Astronomy and Space Geodesy Vladislav Shimansky. Together, they contributed to a recent paper in Monthly Notices of the Royal Astronomical Society.

    The nearest interstellar clouds with confirmed fullerene presence are about 1,000 light years away from Earth. Electromagnetic spectra of 19 distant stars were
    provided by the VLT telescope in Chile, one of the largest in the world. The authors found fullerenes which left traces – absorption lines in certain frequencies.

    VIRGO
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    +1
    Impressive rocket re-entry over South America, large fragment found in Peru
    https://watchers.news/...impressive-rocket-re-entry-over-south-america-large-fragment-found-in-peru/

    Residents of eastern Brazil and northern Peru witnessed a rare atmospheric re-entry of a recently launched rocket that ended up hard landing in pieces
    over South America. The rocket was launched from Baikonur Cosmodrome in Kazakhstan on December 26, 2017, carrying AngoSat 1 Communications Satellite.

    Reentrada de lixo espacial no Acre, Rondônia e Peru parte 2 - imagens do fragmentos encontrados
    https://www.youtube.com/watch?time_continue=15&v=llxoArXZpmY
    VIRGO
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    +1
    James Webb Space Telescope’s Multifaceted MIRI
    https://www.youtube.com/watch?v=PYIfmAbkk4k
    VIRGO
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    https://www.nasa.gov/feature/super-blue-blood-moon-coming-jan-31

    Beginning at 5:30 a.m. EST on Jan. 31, a live feed of the Moon will be offered on NASA TV and NASA.gov/live. You can also follow at @NASAMoon.
    Weather permitting, the NASA TV broadcast will feature views from the varying vantage points of telescopes at NASA’s Armstrong Flight Research
    Center in Edwards, California; Griffith Observatory in Los Angeles; and the University of Arizona’s Mt. Lemmon SkyCenter Observatory.

    VIRGO
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    Astrochemists reveal the magnetic secrets of methanol | Chalmers
    https://www.chalmers.se/...oso/news/Pages/Astrochemists-reveal-the-magnetic-secrets-of-methanol.aspx

    ​A team of scientists, led by Boy Lankhaar at Chalmers University of Technology, has solved an important puzzle in astrochemistry: how to measure magnetic fields in space
    using methanol, the simplest form of alcohol. Their results, published in the journal Nature Astronomy, give astronomers a new way of investigating how massive stars are born.

    ​Over the last half-century, many molecules have been discovered in space. Using radio telescopes, astronomers have with the help of these molecules been able to investigate just
    what happens in the dark and dense clouds where new stars and planets are born.

    Scientists can measure temperature, pressure and gas motions when they study the signature of molecules in the signals they detect. But especially where the most massive stars
    are born, there’s another major player that’s more difficult to measure: magnetic fields.

    VIRGO
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    Space in Images - 2018 - 01 - Obscured Sirius reveals Gaia 1 cluster
    http://www.esa.int/spaceinimages/Images/2018/01/Obscured_Sirius_reveals_Gaia_1_cluster

    Dazzling stars like Sirius are both a blessing and a curse for astronomers. Their bright appearance provides plenty of light
    to study their properties, but also outshines other celestial sources that happen to lie in the same patch of sky.

    This is why Sirius has been masked in this picture taken by amateur astronomer Harald Kaiser on 10 January from Karlsruhe,
    a city in the southwest of Germany.

    Once the glare of Sirius is removed, an interesting object becomes visible to its left: the stellar cluster Gaia 1, first
    spotted last year using data from ESA’s Gaia satellite.

    Gaia 1 is an open cluster – a family of stars all born at the same time and held together by gravity – and it is located
    some 15 000 light-years away. Its chance alignment next to nearby, bright Sirius kept it hidden to generations of astronomers
    that have been sweeping the heavens with their telescopes over the past four centuries. But not to the inquisitive eye of Gaia,
    which has been charting more than a billion stars in our Milky Way galaxy.

    IoW_20180129 - Cosmos
    https://www.cosmos.esa.int/web/gaia/iow_20180129

    VIRGO
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    What would it have been like to witness the beginning of the universe?
    https://theconversation.com/...ould-it-have-been-like-to-witness-the-beginning-of-the-universe-90043

    In the Big Bang, space was suffused with light. A fraction of a second after the event, the universe was over a million trillion
    times smaller than an atom. It was also hot: a septillion (one followed by 24 zeroes) times hotter than the centre of the sun.

    From this small and hot beginning, the expansion and cooling started. In this early stage, the universe was extremely bright and
    at frequencies of light that humans cannot see. There were no stars, only a uniform and formless soup of particles. In opening your
    eyes to the night sky – if such a thing were possible in the moment before you burned up – you would have been instantly blinded by
    the intensity of the light (even light outside visible frequencies can harm our eyes).

    [1801.03278] How Bright Was the Big Bang?
    https://arxiv.org/abs/1801.03278

    VIRGO
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    2018 | University of Canterbury
    http://www.canterbury.ac.nz/...ws-first-jet-from-massive-young-star-detected-outside-our-galaxy.html

    In a significant astronomical discovery, a University of Canterbury scientist has made the very first detection of a jet from a very young, massive star in a galaxy that is not our own.

    Dr McLeod is the lead author of the new article about the discovery “A parsec-scale optical jet from a massive young star in the Large Magellanic Cloud”, co-authored with researchers
    in Germany, the United Kingdom and the United States, which has been published today in Nature, one of the highest-impact scientific journals.

    The researchers say the jet spans about 36 light years (or 11 parsecs), which makes it among the largest jets of its kind ever found. The star powering the jet appears to be about
    12 times as massive as our Sun. The data used for this work comes from the Very Large Telescope (VLT) in Chile’s Atacama Desert, which is among the largest optical telescopes in
    the world and is one of the most competitive telescopes on which to obtain precious observing time.

    VIRGO
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    Where are You Going in 2018 (Cosmically Speaking)? - Out There
    http://blogs.discovermagazine.com/outthere/2018/01/24/going-2018-cosmically-speaking/#.WmnVZPmnFhE

    How to answer the question Where are you going? depends entirely your reference frame. There is no master set of coordinates for the universe (thanks a lot, Einstein),
    so you can only answer the question by addressing the subordinate question, In relation to what? Fortunately, that’s exactly when things start to get interesting.

    Astronomy textbooks typically depict our motion through space in terms of vector arrows pointing in different directions, indicating the direction of Earth’s orbit
    around the Sun and the like. A recent question on Quora got me thinking about things a different way, however. What if you were suddenly motionless relative to the
    various cosmic reference frames about you? What would you see and experience if you made yourself the center of the universe, and let everything else move around you?

    VIRGO
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    +3
    Europa and Other Planetary Bodies May Have Extremely Low-Density Surfaces | Planetary Science Institute
    http://www.psi.edu/news/press-releases

    Spacecraft landing on Jupiter’s moon Europa could see the craft sink due to high surface porosity, research by Planetary Science Institute Senior Scientist Robert Nelson shows.

    Nelson was the lead author of a laboratory study of the photopolarimetric properties of bright particles that explain unusual negative polarization behavior at low phase angles
    observed for decades in association with atmosphereless bodies including asteroids 44 Nysa, 64 Angelina and the Galilean satellites Io, Europa and Ganymede.

    These observations are explained by extremely fine-grained particles with void space greater than about 95 percent. Grain sizes would be on the order of the wavelength of light
    of the observations (a fraction of a micron). This corresponds to material that would be less dense than freshly fallen snow, raising questions about the risk of a Europa lander
    sinking into the surface of the Jupiter satellite.

    This work was published in the journal Icarus and is titled "Laboratory simulations of planetary surfaces: Understanding regolith physical properties from remote photopolarimetric
    observations."

    Observations were made using a goniometric photopolarimeter of novel design located at Mt. San Antonio College in Walnut, California. The powders used were aluminum oxide
    (Al2O3), which is an excellent regolith analog for high albedo airless bodies in the solar system, including water ice bodies such as Europa.

    VIRGO
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    SpaceX - Falcon Heavy - Wet Load All Boosters 01-20-2018
    https://www.youtube.com/watch?v=pdcDI98RSgo
    VIRGO
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    +2
    Forming Stars Near Our Supermassive Black Hole
    http://aasnova.org/2018/01/24/forming-stars-near-our-supermassive-black-hole/

    Around Sgr A*, the supermassive black hole lurking at the Milky Way’s center, lies a population of ~200 massive, young, bright stars. Their very tight orbits around
    the black hole pose a mystery: did these intrepid stars somehow manage to form in situ, or did they instead migrate to their current locations from further out?

    For a star to be born out of a molecular cloud, the self-gravity of the cloud clump must be stronger than the other forces it’s subject to. Close to a supermassive
    black hole, the brutal tidal forces of the black hole dominate over all else. For this reason, it was thought that stars couldn’t form in the hostile environment
    near a supermassive black hole — until clues came along suggesting otherwise.

    VIRGO
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    BETTER: Parááda! Tohle video e lepší než to odpoledmí. :)
    VIRGO
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    Scientists fine-tune formula for finding signs of life in alien air – GeekWire
    https://www.geekwire.com/2018/scientists-fine-tune-formula-finding-signs-life-alien-atmospheres/

    If we detect oxygen in the atmosphere of an alien world, does that mean life is present? Not necessarily:
    Scientists say the chemical signature of biological activity is likely to be more subtle, involving a mix of gases that might seem out of whack.

    In a paper published today in Science Advances, researchers say future observatories such as NASA’s James Webb Space Telescope should look for
    the signature of atmospheric gases that would be in disequilibrium if it weren’t for biological processes.

    NASA | Alien Atmospheres
    https://www.youtube.com/watch?v=CcUhVCMAhAI


    The study’s lead author, Joshua Krissansen-Totton of the University of Washington, says looking for oxygen alone shouldn’t be the sole strategy
    in the search for life on extrasolar planets.

    “This idea of looking for atmospheric oxygen as a biosignature has been around for a long time. And it’s a good strategy — it’s very hard to make
    much oxygen without life,” he said in a news release. “But we don’t want to put all our eggs in one basket. Even if life is common in the cosmos,
    we have no idea if it will be life that makes oxygen. The biochemistry of oxygen production is very complex and could be quite rare.”

    He and his colleagues propose an alternative chemical formula to look for: methane plus carbon dioxide, minus carbon monoxide.

    VIRGO
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    European-Russian space mission steps up the search for life on Mars | EurekAlert! Science News
    https://www.eurekalert.org/pub_releases/2018-01/miop-esm012418.php

    The ExoMars joint space mission of ESA and Roscosmos involves two phases. The first one started on March 14, 2016,
    with the launch of a Proton-M booster rocket from Russia's space complex in Baikonur, Kazakhstan. The rocket launched two modules:
    the Schiaparelli lander and the Trace Gas Orbiter (TGO). The two were delivered to Mars in 226 days, making a journey of 500 million kilometers.

    VIRGO
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    +4
    SpaceX fires engines on big new rocket in launch pad test
    https://phys.org/news/2018-01-spacex-big-rocket-pad.html

    SpaceX fired up its newest, biggest rocket in a critical launch pad test Wednesday, advancing toward a long-anticipated test flight possibly in just a week.

    VIRGO
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    +7
    Curio MAHLI selfie on the South Rim of Vera Rubin Ridge, Sol 1940 (23/01/18). Credits: NASA/JPL-CalTech/MSSS. Processed by Paul Hammond

    VIRGO
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    JULIANNE: Čupr! :)
    JULIANNE
    JULIANNE --- ---
    1 odpověď+1
    VIRGO: Vida, to už vyšlo! Vera Dobos byla na Geosciences for Understanding Planetary Habitability in The Solar System and Beyond, and Lena Noack se jí celkem případně ptala na to, jestli plánuje zahrnout indukční ohřev, já snad na to, jestli přibudou slapové interakce mezi planetami, nejen hvězda-planeta, a Tomáš Petrásek na atmosférický feedback. Třeba už tam všechno je, jdu se mrknout :).
    Kliknutím sem můžete změnit nastavení reklam