• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    XCHAOS
    XCHAOS --- ---
    VIRGO: ...ovšem začít se musí tím, že se Marsu pořídí magnetosféra:
    NASA proposes a magnetic shield to protect Mars' atmosphere
    https://phys.org/news/2017-03-nasa-magnetic-shield-mars-atmosphere.html
    VIRGO
    VIRGO --- ---
    Astronomický ústav AV ČR - Novinky
    http://www.asu.cas.cz/...s/1184/19/evropska-jizni-observator-si-v-praze-pripomene-10-let-clenstvi-cr

    Ve dnech 7. - 8. března 2017 zasedne v Praze Rada Evropské jižní observatoře (ESO Council). Tento vrcholný orgán ESO
    zasedá čtyřikrát ročně a jeho pražské zasedání se koná při příležitosti 10 let členství České republiky v ESO. Evropská
    jižní observatoř provozuje nejvýkonnější astronomické přístroje na světě a čeští astronomové se na tom podílejí.
    VIRGO
    VIRGO --- ---
    Archaea: The 'Dark Matter' of the Microbial World - The Atlantic
    https://www.theatlantic.com/science/archive/2017/03/archaea-sequencing-challenges/518535/

    The three domains that make up all life on Earth are bacteria, archaea, and complex life (which includes us humans). And a new study of gut microbiomes finds
    that a common DNA sequencing technique overlooks 90 percent of the diversity in archaea—the single-celled organisms that comprise the oft-forgotten third domain.
    Archaea and bacteria are both microbes—microscopic and single-celled —but do not make the mistake, as scientists once did, of thinking they are basically alike.

    Archaea are at once alien and intimately familiar. Many of the most well-known ones are extremophiles, which live in harsh environments like hot springs. Yet,
    archaea may be evolutionarily more closely related to us—multicellular humans—than bacteria. “When I tell people I work on archaea, most people don’t even know
    what it is,” said Kasie Raymann, a microbiologist at the University of Texas at Austin and an author of the study.
    VIRGO
    VIRGO --- ---
    JWST is back at Goddard´s cleanrooms

    VIRGO
    VIRGO --- ---
    Introducing the New CNEOS Website
    Center for NEO Studies
    http://cneos.jpl.nasa.gov/
    he Jet Propulsion Laboratory's Center for Near-Earth Object Studies (CNEOS) has created the CNEOS website at http://cneos.jpl.nasa.gov
    to replace the legacy Near-Earth Object Program website at http://neo.jpl.nasa.gov. The CNEOS website provides the same near-Earth object
    (NEO) data as on the legacy site, in a modern, interactive framework, and it incorporates new content as well. High-quality NEO orbital
    elements, summaries of close approaches, the Sentry impact risk table, NEO discovery statistics, and data on asteroids that might be
    accessible for exploration are all presented in interactive tables and plots.
    VIRGO
    VIRGO --- ---
    Three New Minerals Discovered in a Unique Meteorite | Caltech
    http://www.caltech.edu/news/three-new-minerals-discovered-unique-meteorite-54307

    Same meteorite contains the only known naturally occurring quasicrystals—solid matter with symmetries once thought impossible

    Researchers led by mineralogist Chi Ma have identified three new minerals in a tiny sample of the Khatyrka meteorite. The meteorite,
    recovered in pieces from the Koryak Mountains in eastern Russia in 1979 and 2011, made news in recent years for containing the first three
    natural quasicrystals ever found. (A quasicrystal is a phase of solid matter with symmetries previously thought to be impossible).

    JULIANNE
    JULIANNE --- ---
    Ve čtvrtek začíná letošní seminář z astrobiologie (v odkazu upoutávka na první přednášku i celý program):

    Astrobiologie: Evoluce chytrého mozku - Kalendář akcí | Přírodovědci.cz
    https://www.prirodovedci.cz/kalendar-akci/astrobiologie-evoluce-chytreho-mozku
    VIRGO
    VIRGO --- ---
    Czech scientists develop magnetic carbon
    https://phys.org/news/2017-03-czech-scientists-magnetic-carbon.html

    A dream of many generations of researchers has been fulfilled by a discovery made by scientists at the Regional Centre of Advanced Technologies and Materials
    (RCPTM) at the Palacky University in Olomouc. By using graphene, an ultrathin form of carbon, these scientists prepared the first non-metallic magnet that retains
    its magnetic properties up to room temperature. In doing so, they disproved the old belief that all materials with room temperature magnetism are based on metals
    or their compounds. Chemically modified magnetic graphene has a vast range of potential applications, particularly in the fields of biomedicine and electronics.
    The work of the Czech scientists has recently been published in Nature Communications.
    VIRGO
    VIRGO --- ---
    Instituto de Astrofísica de Canarias - IAC - Educational Outreach
    http://www.iac.es/divulgacion.php?op1=16&id=1167&lang=en
    A new study suggests that the gravitational waves detected by the LIGO experiment must have come
    from black holes generated during the collapse of stars, and not in the earliest phases of the Universe.

    VIRGO
    VIRGO --- ---
    Researchers investigate chemical composition of globular cluster NGC 6362
    https://phys.org/news/2017-03-chemical-composition-globular-cluster-ngc.html

    European astronomers have recently studied the chemical composition of the low-mass globular cluster designated NGC 6362.
    Their detailed analysis of chemical abundances for 17 elements in the cluster provides important insights into the nature
    of NGC 6362. The findings were presented March 1 in a paper published online on arXiv.org.

    Located about 25,000 light years away in the constellation Ara, NGC 6362 is a an irregularly shaped globular cluster. With
    a mass of approximately 53,000 solar masses, it is one of the least massive globulars where multiple populations of stars
    have been detected. The cluster is about 13.5 billion years old.

    Although NGC 6362 is well known to astronomers, its detailed chemical composition has not been studied so far. So a team of
    researchers led by Davide Massari of the Leiden Observatory in Netherlands investigated chemical abundances of this cluster.
    For their study, they used the FLAMES and UVES high-resolution spectrographs mounted on the Very Large Telescope in Chile.

    VIRGO
    VIRGO --- ---
    Karoo’s HERA radio telescope attracts even more international funding – SKA SA
    http://www.ska.ac.za/...leases/karoos-hera-radio-telescope-attracts-even-more-international-funding/

    The Hydrogen Epoch of Reionization Array (HERA) radio telescope, located only a few kilometres from the MeerKAT radio telescope, was awarded
    a grant from the Gordon and Betty Moore Foundation in the US to the value of $5.8 million, equivalent to approximately R75 million.

    The construction of HERA started in 2015 and already 35 of the 14-metre diameter dishes have been erected. In September 2016, the National Science Foundation
    (NSF) invested $9.5 million (equivalent to approximately R124 million) in the project and HERA was granted the status of a Square Kilometre Array (SKA) precursor
    telescope. The NSF funding allowed the array to expand to 240 radio dishes by 2018. This additional funding injection from the Gordon and Betty Moore Foundation
    will allow HERA to expand even further to 350 dishes.

    This innovative radio telescope will be instrumental in detecting the distinctive signature that would allow astronomers to understand the formation and evolution
    of the very first luminous sources: the first stars and galaxies in the Universe – a period the scientists call the Epoch of Reionization (EoR).

    VIRGO
    VIRGO --- ---
    Why is NASA going to visit the giant metal asteroid 16 Psyche? - Science News - ABC News (Australian Broadcasting Corporation)
    http://www.abc.net.au/...017-03-06/16-psyche-asteroid-like-no-other-metal-world-nasa-mission/8316054

    Hiding in the belt of frozen rocks between Mars and Jupiter is a body like nothing else in the solar system. The odds of it even existing are tiny.
    Its name is 16 Psyche. At 210 kilometres wide, it is easily one of the bigger asteroids, but Psyche's stand-out feature is that it is made almost entirely of metal.
    That is so unusual that NASA is funding a seven-year mission to visit the asteroid with a robotic spacecraft and study it in detail.

    VIRGO
    VIRGO --- ---
    https://www.nasa.gov/image-feature/jpl/pia20524/dichotomy

    This view looks toward the anti-Saturn hemisphere of Enceladus. North on Enceladus is up and rotated 4 degrees to the right.
    The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Nov. 27, 2016.

    The view was obtained at a distance of approximately 41,000 miles (66,000 kilometers) from Enceladus. Image scale is 1,310 feet (398 meters) per pixel.

    VIRGO
    VIRGO --- ---
    Star clusters discovery could upset the astronomical applecart
    https://phys.org/news/2017-03-star-clusters-discovery-astronomical-applecart.html

    The discovery of young stars in old star clusters could send scientists back to the drawing board for one of the Universe's most common objects.

    Dr Bi-Qing For, from the International Centre for Radio Astronomy Research in Perth, said our understanding of how stars evolve is a cornerstone of astronomical science.

    "There are a billion trillion stars in the Universe and we've been observing and classifying those we can see for more than a century," she said.
    "Our models of stellar evolution are based on the assumption that stars within star clusters formed from the same material at roughly the same time."

    VIRGO
    VIRGO --- ---
    Congrats! Kepler observatory was launched today in 2009 to find signs of other Earth-like planets.

    How many exoplanets has Kepler discovered?
    Kepler mission:

    Candidate exoplanets: 4 696
    Confirmed exoplanets: 2 331
    Confirmed exoplanets less than twice Earth-size in the habitable zone: 21

    K2 mission:

    Candidate exoplanets: 520
    Confirmed exoplanets: 145

    https://www.nasa.gov/kepler/discoveries

    VIRGO
    VIRGO --- ---
    Gravity Wave Detection with Atomic Clockssu201709 | www.cfa.harvard.edu/
    https://www.cfa.harvard.edu/news/su201709

    The recent detection of gravitation waves (GW) from the merger of two black holes of about thirty solar-masses each with the ground-based LIGO facility
    has generated renewed enthusiasm for developing even more sensitive measurement techniques. Ground-based GW instruments have widely spaced sensors
    that can detect sub-microscopic changes in their separation -- better than one part in a billion trillion, They suffer, however, from the noise produced by
    small ground tremors -- vibrations from natural or man-made sources that ripple through the precisely tuned detectors. The vibrations most difficult to
    compensate for are those that change relatively slowly, at frequencies around once a second or less, yet astronomers predict that GW sources producing
    these slow variations should be interesting and abundant, from compact stellar-mass binary stars to gravitational events in the early universe.
    VIRGO
    VIRGO --- ---
    Home to a hypergiant | ESA/Hubble
    https://www.spacetelescope.org/images/potw1710a/

    VIRGO
    VIRGO --- ---
    Synthetic biology to help colonize Mars
    https://phys.org/news/2017-03-synthetic-biology-colonize-mars.html

    Shannon Dangle finished her PhD ready to take on a new challenge and set her sights on research to help make Mars colonization possible.
    But she isn't pursuing research on rocket fuels or space suits. She's using synthetic biology to improve biomanufacturing of needed resources
    using simple inputs like sunlight, water, and CO2.
    VIRGO
    VIRGO --- ---
    Hmm, zřejmě vzniká přímá úměra mezi vzrůstajícím počtem objevených exoplanet a pomateností jinak vcelku seriózních pozemšťanů... :DD

    Whole New Worlds: An Aladdin History of Exoplanets | A Capella Science, Trudbol, SamRobson, Gia Mora
    https://www.youtube.com/watch?v=gai8dMA19Sw
    VIRGO
    VIRGO --- ---
    Exoplanets, 4 billion-year-old life, Fermi’s paradox and zero-one laws « Math Scholar
    http://experimentalmath.org/.../exoplanets-4-billion-year-old-life-fermis-paradox-and-zero-one-laws/
    What do exoplanets, four-billion-year-old life, Fermi’s paradox and zero-one laws of probability
    theory have to do with each other? Quite a bit, actually. Let us review these developments, one by one
    Kliknutím sem můžete změnit nastavení reklam