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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
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    Keeping an Eye on Ross 128
    https://www.centauri-dreams.org/?p=38137

    Any nearby stars are of interest from the standpoint of exoplanet investigations, though thus far we’ve yet to discover
    any companions around Ross 128. An M4V dwarf, Ross 128 has about 15 percent of the Sun’s mass. More significantly, it is
    an active flare star, capable of unpredictable changes in luminosity over short periods. Which leads me back to that unusual
    reception. The SETI Institute’s Seth Shostak described it this way in a post:

    What the Puerto Rican astronomers found when the data were analyzed was a wide-band radio signal. This signal not only
    repeated with time, but also slid down the radio dial, somewhat like a trombone going from a higher note to a lower one.

    And as Shostak goes on to say, “That was odd, indeed.”

    ---

    Last night photo of Ross 128 (center) by Alberto Q Vodniza from the University of Nariño Observatory - Colombia

    VIRGO
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    Scientists 'Teleport' a Particle Hundreds of Miles—But What Does That Mean?
    http://gizmodo.com/scientists-teleport-a-particle-hundreds-of-miles-but-w-1796818859/amp

    Humanity is advancing rapidly towards a place where the news sounds an awful lot like science fiction. In fact, yesterday, Chinese scientists
    reported that they “teleported” a photon over hundreds of miles using a “quantum satellite.” But this isn’t Star Trek. It’s the real world.

    This “quantum teleportation” doesn’t actually involve teleporting a real object—it’s not really teleportation at all. The scientists are actually
    sending information about a particle of light in a way that can only be accessed by two observers. This could have major implications for the future
    of computing—it would make for incredible data encryption. But encryption with this technology is still pretty far off.

    Still, the researchers write in their new paper, “This work establishes the first ground-to-satellite up-link for faithful and ultra-long-distance
    quantum teleportation, an essential step toward global-scale quantum internet.” Let’s walk through what that means.

    VIRGO
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    Planets Like Earth May Have Had Muddy Origins | Planetary Science Institute
    http://www.psi.edu/news/asteroidmud

    Scientists have long held the belief that planets – including Earth – were built from rocky asteroids, but new research challenges that view.

    Published in Science Advances, a journal of the American Association for the Advancement of Science, the research suggests that many of the
    original planetary building blocks in our solar system may actually have started life, not as rocky asteroids, but as gigantic balls of warm mud.

    Phil Bland, Curtin University planetary scientist, undertook the research to try and get a better insight into how smaller planets, the precursors
    to the larger terrestrial planets we know today, may have come about.

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    Scientists Are Using the Universe as a "Cosmological Collider"2017-22 | www.cfa.harvard.edu/
    https://www.cfa.harvard.edu/news/2017-22

    Physicists are capitalizing on a direct connection between the largest cosmic structures and
    the smallest known objects to use the universe as a "cosmological collider" and investigate new physics.

    The three-dimensional map of galaxies throughout the cosmos and the leftover radiation from the Big Bang –
    called the cosmic microwave background (CMB) – are the largest structures in the universe that astrophysicists
    observe using telescopes. Subatomic elementary particles, on the other hand, are the smallest known objects in
    the universe that particle physicists study using particle colliders.

    A team including Xingang Chen of the Harvard-Smithsonian Center for Astrophysics (CfA), Yi Wang from the Hong
    Kong University of Science and Technology (HKUST) and Zhong-Zhi Xianyu from the Center for Mathematical Sciences
    and Applications at Harvard University has used these extremes of size to probe fundamental physics in an
    innovative way. They have shown how the properties of the elementary particles in the Standard Model of particle
    physics may be inferred by studying the largest cosmic structures. This connection is made through a process
    called cosmic inflation.

    VIRGO
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    Backreaction: Penrose claims LIGO noise is evidence for Cyclic Cosmology
    http://backreaction.blogspot.cz/2017/07/penrose-claims-ligo-noise-is-evidence.html

    Noise is the physicists’ biggest enemy. Unless you are a theorist whose pet idea
    masquerades as noise. Then you are best friends with noise. Like Roger Penrose.

    Penrose doesn’t like most of what’s currently in fashion, but believes that human consciousness can’t be explained
    by known physics and that the universe is cyclically reborn. This cyclic cosmology, so his recent claim, gives rise
    to correlations in the LIGO noise – just like what’s been observed.

    VIRGO
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    https://www.nasa.gov/...nasa-looks-to-the-solar-eclipse-to-help-understand-the-earth-s-energy-system

    On Aug. 21, 2017, scientists are looking to this year’s total solar eclipse passing across America to improve our modelling capabilities
    of Earth’s energy. Guoyong Wen, a NASA scientist working for Morgan State University in Baltimore, is leading a team to gather data from
    the ground and satellites before, during and after the eclipse so they can simulate this year’s eclipse using an advanced computer model,
    called a 3-D radiative transfer model. If successful, Wen and his team will help develop new calculations that improve our estimates of
    the amount of solar energy reaching the ground, and our understanding of one of the key players in regulating Earth’s energy system, clouds.

    VIRGO
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    NASA’s Hubble Sees Martian Moon Orbiting the Red Planet
    https://www.nasa.gov/feature/goddard/2017/hubble-sees-martian-moon-orbiting-the-red-planet

    The sharp eye of NASA's Hubble Space Telescope has captured the tiny moon Phobos during its orbital trek around Mars.
    Because the moon is so small, it appears star-like in the Hubble pictures.

    Over the course of 22 minutes, Hubble took 13 separate exposures, allowing astronomers to create a time-lapse video
    showing the diminutive moon's orbital path. The Hubble observations were intended to photograph Mars, and the moon's
    cameo appearance was a bonus.

    VIRGO
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    https://ucrtoday.ucr.edu/48292

    The international SpARCS collaboration based at UC Riverside has made the best measurement
    yet of the amount of fuel available to form stars in clusters of galaxies located in the early universe

    The international Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) collaboration based at the University of California,
    Riverside has combined observations from several of the world’s most powerful telescopes to carry out one of the largest studies yet
    of molecular gas – the raw material which fuels star formation throughout the universe – in three of the most distant clusters of
    galaxies ever found, detected as they appeared when the universe was only four billion years old.

    VIRGO
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    ESTEN: Díky!
    VIRGO
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    Ground-based images of planets obtained by Pic-Net Pro-Am team
    https://phys.org/news/2017-07-ground-based-images-planets-pic-net-pro-am.html

    The first observing run of a collaboration between amateur and professional astronomers to monitor
    our planetary neighbours has resulted in some of the best planetary images ever taken from the ground.

    The 'Pic-Net' project (http://pic-net.org/) aims to use the one-metre diameter planetary telescope at the Pic du Midi Observatory in the French Pyrenees
    to monitor the meteorology of planets in our Solar System, measure global winds in their atmospheres, monitor impact of minor planet bodies producing giant
    fireballs in planetary atmospheres, and provide observational support for various space missions. Last month, a small team of amateur astronomers carried
    out a pilot observing run during a workshop funded by the Europlanet 2020 Research Infrastructure (RI). Superb-quality images of Jupiter, Saturn, Venus
    and Jupiter's moon Ganymede were obtained during four nights of observations, as well as images of Uranus and Neptune.



    VIRGO
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    http://www.seti.org/...release/seti-institute-unistellar-partnership-promises-revolutionize-amateur

    The SETI Institute and French startup Unistellar, announced a partnership today to commercialize a new telescope that promises to deliver
    an unparalleled view of the cosmos to amateur astronomers, and provide the opportunity to contribute directly to cutting-edge science.

    Unistellar’s new eVscope™ leverages “Enhanced Vision” imaging technology and now provides three unique features never before offered in
    a compact mass-market instrument thanks to this partnership.

    "Our compact 4.5-inch telescope allows observers to see objects fainter than Pluto and achieve sensitivity equivalent to a one-meter telescope!”"

    VIRGO
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    Ancient Impacts Shaped the Structure of the Milky Way - Universe Today
    https://www.universetoday.com/136496/ancient-impacts-shaped-structure-milky-way/

    A recent study by a team from the University of Kentucky (UK) has challenged previously-held notions about how our galaxy has evolved
    to become what we see today. Based on observations made of the Milky Way’s stellar disk, which was previously thought to be smooth,
    the team found evidence of asymmetric ripples. This indicates that in the past, our galaxy may have been shaped by ancient impacts.

    These could include a merger between the Milky Way and the Sagittarius dwarf galaxy roughly 0.85 billion years ago, as well as our
    galaxy’s current merger with the Canis Major dwarf galaxy.

    The study, titled “Milky Way Tomography with K and M Dwarf Stars: The Vertical Structure of the Galactic Disk“, recently appeared in
    the The Astrophysical Journal. Led by Deborah Ferguson, a 2016 UK graduate, the team consisted of Professor Susan Gardner – from
    the UK College of Arts and Sciences – and Brian Yanny, an astrophysicist from the Fermilab Center for Particle Astrophysics (FCPA).

    SDSS at Night
    https://www.youtube.com/watch?v=AHsS57NMQjE
    VIRGO
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    VIRGO
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    What is the Probability of Other Technological Species?
    https://www.youtube.com/watch?v=5dBToCscwTA


    Can there be other technological civilizations in our Milky Way Galaxy?

    Tune in this week as we discuss with Dr. Adam Frank the cosmic frequency of technological species in the Universe.
    Recent advances in exoplanet studies provide strong constraints on all astrophysical terms in the Drake Equation.
    By modifying the form and intent of the Drake equation Dr. Frank shows that they can set a firm lower bound on the
    probability that one or more additional technological species have evolved anywhere and at any time in the history
    of the observable Universe.

    Join Tony Darnell, Dr. Adam Frank, Dr. Svetlana Berdyugina and Dr. Jeff Kuhn for a great conversation about finding
    life in the Universe.

    Dr. Adam Frank's Paper:

    http://online.liebertpub.com/doi/pdfplus/10.1089/ast.2015.1418

    Press Release:

    Are we alone? Setting some limits to our uniqueness :: Newsroom :: University of Rochester
    http://www.rochester.edu/news/are-we-alone-in-the-universe/
    VIRGO
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    Jak se pomalu blíží kompletace výsledků EHT, vzrůstá nervozita vědců i publicistů... :)

    When is a black hole not a black hole? When it’s a boson star | New Scientist
    https://www.newscientist.com/article/mg23531340-600-when-is-a-black-hole-not-a-black-hole/

    VIRGO
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    Views of a “Chondritic Meteorite” in thin section. This is a meteorite that was polished to only about 0.03 millimeters thick, thin enough that light can travel
    through the rocks. It is then put on a polarizing microscope and polarized light is sent through it. That gives you a chance to see some of the minerals and textures,
    but there is a second step here. A geologists microscope will have a second polarizer above the sample. That second polarizer can be rotated so that only light that
    had its direction changed by passing through the mineral reaches the eye of the viewer. This produces an effect called Birefringence, the colors seen in these grains.
    Birefringence colors can be used along with mineral textures to identify rock types.

    This video shows the upper polarizer being rotated, so the light goes from singly-polarized to doubly polarized and colors appear as they do it. The spherical blobs
    in this sample are the chondrules. They are thought to have been blobs of rapidly melted, rapidly cooled rock that floated out in space. Eventually they were assembled
    into rocks on some of the early asteroids.

    Chondrules in cross polarized light
    https://vimeo.com/103549466
    VIRGO
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    NASA: Mysteries of the Sun free book PDF
    https://www.nasa.gov/pdf/637244main_MysteriesOfTheSun_Book.pdf

    VIRGO
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    Montáž nekalibr. RG/UV3 snímků Cassini z 16/07/17

    VIRGO
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    Bad News for Life: TRAPPIST-1 Planets' Atmospheres May Have Been Destroyed
    https://www.space.com/37530-trappist-1-planets-atmospheres-stripped.html

    The potentially Earth-like planets in the TRAPPIST-1 system may not be so conducive to life after all, two new studies report.

    Intense radiation and particles streaming from their host star have likely taken a huge toll on all seven of these worlds, even the three that
    apparently lie within the "habitable zone," where liquid water could theoretically exist on a planet's surface, according to the new research.

    "Because of the onslaught by the star's radiation, our results suggest the atmosphere on planets in the TRAPPIST-1 system would largely be destroyed,"
    Avi Loeb, co-author of one of the studies, said in a statement. "This would hurt the chances of life forming or persisting," added Loeb, who chairs
    Harvard's astronomy department and who also works at the Harvard-Smithsonian Center for Astrophysics (CfA).

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