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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
    VIRGO --- ---
    https://lowell.edu/spinning-comet/

    Astronomers at Lowell Observatory observed comet 41P/Tuttle-Giacobini-Kresak last spring and noticed that the speed of its rotation was quickly slowing down.
    A research team led by David Schleicher studied the comet while it was closer to the Earth than it has ever been since its discovery. The comet rotational
    period became twice as long, going from 24 to more than 48 hours within six weeks, a far greater change than ever observed before in a comet. If it continues
    to slow down, it might stop completely and then begin rotating in the opposite direction.

    VIRGO
    VIRGO --- ---
    Samples brought back from asteroid reveal ‘rubble pile’ had a violent past - News and Events | Curtin University, Perth, Western Australia
    http://news.curtin.edu.au/...releases/samples-brought-back-asteroid-reveal-rubble-pile-violent-past/

    Curtin University planetary scientists have shed some light on the evolution of asteroids,
    which may help prevent future collisions of an incoming ‘rubble pile’ asteroid with Earth.

    The scientists studied two incredibly small particles brought back to Earth from the asteroid
    Itokawa, after they were collected in 2005 from the surface of the 500 metre-wide asteroid,
    by the Japanese Hayabusa spacecraft.

    The Geology-published research, Collisional history of asteroid Itokawa, used the Argon-Argon
    dating technique to investigate when impact crater events happened on Itokawa, offering a glimpse
    into the asteroid’s impact history.

    VIRGO
    VIRGO --- ---
    Cassini: The Grand Finale: NASA Team Finds Noxious Ice Cloud on Saturn’s Moon Titan
    https://saturn.jpl.nasa.gov/news/3128/nasa-team-finds-noxious-ice-cloud-on-saturns-moon-titan/

    Researchers with NASA’s Cassini mission have found evidence of a toxic hybrid ice in a wispy cloud high above the south pole of Saturn’s largest moon, Titan.
    The finding is a new demonstration of the complex chemistry occurring in Titan’s atmosphere—in this case, cloud formation in the giant moon’s stratosphere—and
    part of a collection of processes that ultimately helps deliver a smorgasbord of organic molecules to Titan’s surface.

    VIRGO
    VIRGO --- ---
    SwRI scientists dig into the origin of organics on Ceres | SwRI
    http://www.swri.org/press-release/swri-scientists-dig-origin-organics-ceres

    Since NASA’s Dawn spacecraft detected localized organic-rich material on Ceres, Southwest Research Institute (SwRI) has been digging into the data to explore different scenarios
    for its origin. After considering the viability of comet or asteroid delivery, the preponderance of evidence suggests the organics are most likely native to Ceres.

    VIRGO
    VIRGO --- ---
    Number of undiscovered near-Earth asteroids revised downward
    https://phys.org/news/2017-10-undiscovered-near-earth-asteroids-downward.html

    Observers have been cataloging potentially hazardous asteroids for decades. Based on the number of finds, the area of sky explored, and the limiting brightness our telescopes
    and cameras can reach, researchers can estimate what fraction of the NEA population has been detected so far and how many more objects lurk undiscovered. Harris has published
    numerous such estimates over the years. Recently he realized that his estimates have been plagued by a seemingly innocuous but nonetheless consequential round-off error. Once
    corrected, the estimated number of large (diameter > 1 kilometer) NEAs remaining to be discovered decreases from more than 100 to less than 40.

    The population ("size-frequency distribution") of NEAs is usually given in terms of number versus brightness, since most discovery surveys operate in visible (reflected) light.
    Brightness isn't a reliable proxy for size, though, because asteroid surfaces don't all have the same albedo, or reflectivity. NEA brightnesses are expressed in units of absolute
    magnitude H, with lower numbers indicating brighter objects. The IAU Minor Planet Center—the world's clearinghouse for asteroid measurements—rounds off reported values of H to
    the nearest 0.1 magnitude. While this is mostly unimportant, amounting to a reduction in the estimated NEA population N ( less than H ) of only about 7%, it becomes significant in
    assessing the completion of surveys for the largest objects.
    VIRGO
    VIRGO --- ---
    Bright daylight meteor recorded over Long Island, New York
    https://watchers.news/2017/10/19/new-york-daylight-meteor-long-island/

    Fireball footage viewed from Sea Girt NJ on October 18 2017 Meteor Space Debris entering atmosphere
    https://www.youtube.com/watch?v=Ka-STlR_1ow
    VIRGO
    VIRGO --- ---
    Přeposílám:

    Pozvánka na říjnovou Kosmoschůzku 2017

    místo konání: restaurace ZORTO http://www.zorto.cz/ (Nekázanka 6. Praha 1)
    datum akce: 25. 10. 2017
    začátek akce: 18:00
    předpokládaný konec akce: 21:00+

    Zajímavosti z kosmonautiky (červen - říjen 2017) -- Lubor Lejček

    Nové pulsarové planety? -- Julie Nováková

    První potvrzené exoplanety byly objeveny u milisekundového pulsaru - extrémně rychle rotující neutronové hvězdy.
    Později byly nalezeny dvě další v lecčem podobné, v lecčem velice odlišné soustavy. Na konci září byla možná po
    velmi dlouhé době objevena čtvrtá. Jsou pulsarové planety opravdu tak vzácné? Jak vznikají, co se o nich můžete
    dozvědět a co nám mohou říci o vzniku a vývoji planet obecně?

    Kde získat více informací?
    Více informací na webových stránkách Kosmo Klubu, o.s. (http://klub.kosmo.cz/novinky) nebo na e-mailu Kosmoschůzek
    (kosmoschuzky@kosmo.cz). Hlavním organizátorem akce je Petr Tomek - petrtomek98(c)gmail.com.

    Přidejte se k události také na Facebooku!
    https://www.facebook.com/events/637124170008821/
    VIRGO
    VIRGO --- ---
    Los Alamos researchers and supercomputers help interpret the latest LIGO findings
    http://www.lanl.gov/discover/news-release-archive/2017/October/1017-ligo-findings.php

    The theorists tweaked their models and, to their delight, the new LIGO data confirmed that heavy elements beyond iron were formed by
    the r-process (rapid process) in the neutron-star merger. The gravitational wave observation was having a major impact on theory.

    They also quickly noticed that, within seconds of the time of the gravitational waves, the Fermi spacecraft reported a burst of gamma
    rays from the same part of the sky. This is the first time that a gravitational wave source has been detected in any other way. It
    confirms Einstein’s prediction that gravitational waves travel at the same speed as gamma rays: the speed of light.

    VIRGO
    VIRGO --- ---
    https://www.facebook.com/NASAGoddard/videos/10156696111280898/

    Gravity has been making waves - literally. The 2017 Nobel Prize in Physics was awarded for the first direct detection of gravitational waves
    back in 2015. On Monday, October 16, astronomers announced another huge advance in the field of gravitational waves - for the first time,
    we’ve observed light and gravitational waves from the same source, showing exactly where gravitational waves originated.

    This Facebook Live goes deep inside this new era of astronomy. We’ll discuss how this event was detected by our NASA Fermi Gamma-ray Space
    Telescope, the National Science Foundation (NSF) Laser Interferometer Gravitational-Wave Observatory (LIGO) and the European Gravitational
    Observatory’s Virgo and review how many precious metals on Earth, like gold, are remnants of these collisions of neutron stars from millions
    of light-years away.
    VIRGO
    VIRGO --- ---
    Crews battle brush fire near Mount Wilson Observatory - Story | KTTV
    http://www.foxla.com/news/local-news/crews-battle-brush-fire-near-mount-wilson

    Firefighters worked Tuesday to extinguish a fire that scorched about 26 acres of brush after it broke out
    before dawn near the Mount Wilson Observatory in the Angeles National Forest northeast of Los Angeles.

    No injuries were reported and no structures have been threatened, the department reported. Deputies from
    the sheriff's Crescenta Valley Station helped evacuate Mount Wilson Observatory employees.

    VIRGO
    VIRGO --- ---
    Study shows how water could have flowed on ‘cold and icy’ ancient Mars | News from Brown
    http://news.brown.edu/articles/2017/10/icyhighlands

    Research by planetary scientists at Brown University finds that periodic melting of ice sheets on a cold
    early Mars would have created enough water to carve the ancient valleys and lakebeds seen on the planet today.
    VIRGO
    VIRGO --- ---
    Young star provides a glimpse of how planets are made | Cosmos
    https://cosmosmagazine.com/space/young-star-provides-a-glimpse-of-how-planets-are-made

    High powered telescopes aimed at a distant young hot star called V1247 Orionis have yielded
    some intriguing clues to one of astronomy’s most enduring mysteries: how planets form.

    The star – which is being monitored by the Atacama Large Millimetre Array (ALMA) telescope
    in Chile for – can be found in the background of Orion’s Belt. Like most young, hot stars,
    it is surrounded by a large disc of gas and dust.

    Astronomers believe that these discs are intimately bound up with the process of planet formation,
    but the mechanism is poorly understood.

    Dust existing at the outer edges of the disc is likely to drift away into space, while that in
    the inner regions has been shown to be subjected to drag from the surrounding gas. As a result,
    it tends to fall inwards into the star in a process known as “radial drift”.

    Now, however, a team led by Stefan Kraus from the University of Exeter in the UK has analysed data
    from ALMA and identified a large anomaly in the make-up of the disc.

    VIRGO
    VIRGO --- ---
    Is S0-2 a Binary Star?
    http://aasnova.org/2017/10/17/is-s0-2-a-binary-star/

    The most exciting discoveries in astronomy all have something in common: they let us marvel at the fact that nature obeys laws of physics.
    The star S0-2 is one of these exciting discoveries. S0-2 (also known as S2) is a fast-moving star that has been observed to follow a full
    elliptical, 16-year orbit around the Milky Way’s central supermassive black hole, precisely according to Kepler’s laws of planetary motion.
    Serving as a test-particle probe of the gravitational potential, S0-2 provides some of the best constraints on the black hole’s mass and
    distance yet. S0-2 is the brightest of the S-stars, a group of young main-sequence stars concentrated within the inner 1” (0.13 ly) of
    the nuclear star cluster.

    The next time S0-2 reaches its closest approach to the black hole, in 2018, there will exist a unique opportunity to detect a deviation from
    Keplerian motion — namely the relativistic redshift of S0-2’s radial (line-of-sight) velocity — in a direct measurement. In anticipation of
    this event, the authors of today’s paper investigate possible consequences of S0-2 being not a single star, but a spectroscopic binary, which
    would complicate this measurement.

    VIRGO
    VIRGO --- ---
    XCHAOS: Jasně, ale bylo na to uvaleno nejtvrdší informační embargo v letošním roce. I bonzák Krauss už ani nepíp... :))
    VIRGO
    VIRGO --- ---
    Microbes leave "fingerprints" on Martian rocks
    http://medienportal.univie.ac.at/...ailansicht/artikel/microbes-leave-fingerprints-on-martian-rocks/

    Scientists around Tetyana Milojevic from the Faculty of Chemistry at the University of Vienna are in search of unique biosignatures,
    which are left on synthetic extraterrestrial minerals by microbial activity. The biochemist and astrobiologist investigates these
    signatures at her own miniaturized "Mars farm" where she can observe interactions between the archaeon Metallosphaera sedula and Mars-
    like rocks. These microbes are capable of oxidizing and integrating metals into their metabolism. The original research was currently
    published in the journal "Frontiers in Microbiology".

    PANAAK
    PANAAK --- ---
    KATRIN is a German acronym (Karlsruhe Tritium Neutrino Experiment) for an undertaking to measure the mass of the electron antineutrino with sub-eV precision by examining the spectrum of electrons emitted from the beta decay of tritium. The core of the apparatus is a 200-ton spectrometer. In 2015, the commissioning measurements on this spectrometer were completed, successfully verifying its basic vacuum, transmission and background properties.[1] The experiment began running tests in October 2016, with measurements scheduled in 2017.[2]



    KATRIN - Wikipedia
    https://en.wikipedia.org/wiki/KATRIN

    // let's hunt those tiny bastards down with this little contraption!
    PANAAK
    PANAAK --- ---
    XCHAOS
    XCHAOS --- ---
    VIRGO: tohle je docela velký, podle všeho:
    Astronomers Strike Gravitational Gold In Colliding Neutron Stars - Slashdot
    https://science.slashdot.org/...206/astronomers-strike-gravitational-gold-in-colliding-neutron-stars
    A New Rosetta Stone for Astronomy - The Atlantic
    https://www.theatlantic.com/science/archive/2017/10/astronomers-have-seen-the-light/542907/

    ...ale nebyla o tom nějaká letmá zmínka už v tom srpnu?
    VIRGO
    VIRGO --- ---
    New Gravitational Wave Discovery (Press Conference and Online Q&A Session)
    https://www.youtube.com/watch?v=mtLPKYl4AHs
    VIRGO
    VIRGO --- ---
    ESO Telescopes Observe First Light from Gravitational Wave Source | ESO
    http://www.eso.org/public/news/eso1733/

    ESO’s fleet of telescopes in Chile have detected the first visible counterpart to a gravitational wave source.
    These historic observations suggest that this unique object is the result of the merger of two neutron stars.
    The cataclysmic aftermaths of this kind of merger — long-predicted events called kilonovae — disperse heavy
    elements such as gold and platinum throughout the Universe. This discovery, published in several papers in
    the journal Nature and elsewhere, also provides the strongest evidence yet that short-duration gamma-ray
    bursts are caused by mergers of neutron stars.

    ESOcast 133: ESO Telescopes Observe First Light from Gravitational Wave Source
    https://www.youtube.com/watch?v=WucRHOPTpD4
    Kliknutím sem můžete změnit nastavení reklam