• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
    VIRGO --- ---
    Modest Chaos in the Early Solar System
    http://aasnova.org/2016/11/08/modest-chaos-in-the-early-solar-system/

    The puzzling architecture of the Solar system has long been a headache for planetary dynamicists. We can sort of divide its structure
    (cover image, not to scale) into several zones. First, the terrestrial planets Mercury, Venus, Earth and Mars, which are divided from
    the gas and ice giant planets by the asteroid belt. Beyond the ice giants there is the Kuiper belt, which spans out to very large
    distances from the Sun. One longstanding conundrum in this ordering is the relatively small mass of Mars and existence of the asteroid
    belt in between Mars and Jupiter. It shouldn’t be there, and Mars should be way bigger. In fact, Mars is only 10% of the mass of Earth
    and therefore seems to have never accreted enough material to become a fully fledged planet. In planet formation, Mars-sized objects
    are usually termed “planetary embryos”, as we think this is the intermediate stage of a planet’s growth.

    VIRGO
    VIRGO --- ---
    A Brief History of Halley’s Comet Sightings - History in the Headlines
    http://www.history.com/news/a-brief-history-of-halleys-comet-sightings

    Roughly every 76 years, Halley’s comet passes close enough to the Earth to be viewed with the naked eye.
    Astronomer Edmond Halley first predicted the comet’s recurrence in the early 1700s, but sightings of it
    date back to at least the third century B.C., and it’s often taken a starring role in historical events.
    From ancient omens to a 1910 apocalyptic panic, take a look back at how astronomy’s most famous comet
    has been interpreted over the years.

    VIRGO
    VIRGO --- ---
    November 14th's Super-Close Full Moon - Sky & Telescope
    http://www.skyandtelescope.com/press-releases/november-14-super-close-full-moon/
    The full Moon on Monday, November 14th, will be a little bigger and brighter than normal,
    because on that day the Moon will be closer to Earth than it's been in nearly 69 years.

    VIRGO
    VIRGO --- ---
    Exoplanet hunters are missing 75 per cent of two-star worlds | New Scientist
    https://www.newscientist.com/...112005-exoplanet-hunters-are-missing-75-per-cent-of-two-star-worlds/

    Binaries are twice the trouble. The shifty geometry of planets that orbit two stars
    means we’ve missed about 75 per cent of these worlds – but we are playing catch-up.

    Planets that orbit two stars are truly, intriguingly alien – they have varied seasons,
    and formed under different circumstances from planets in our own solar system. They are
    also trickier to discover and study: unlike planets around single stars, they shift
    their orbital paths over just a few years.

    The Kepler telescope has spotted 10 of these worlds by watching them transit, or cross
    in front of their stars from our point of view. Transits around just one star run like
    clockwork: once you know how long the planet’s year is, you can predict exactly when it
    should next pass in front of the star.
    VIRGO
    VIRGO --- ---
    Už asi po páté vidím krátký úryvek této nové série, a všechny jsou úžasné! To musím vidět...
    There's New Footage of That Baby Iguana Battling Killer Snakes
    http://gizmodo.com/new-footage-shows-baby-iguana-battling-killer-snakes-in-1788705625

    Iguana vs Snakes - Behind the Scenes - Planet Earth II
    https://www.youtube.com/watch?v=2cOMjZWJyog
    ATOMIKS
    ATOMIKS --- ---
    VIRGO: našli tam kovový meteorit
    http://www.nasa.gov/feature/jpl/curiosity-mars-rover-checks-odd-looking-iron-meteorite
    Iron-nickel meteorites are a common class of space rocks found on Earth, and previous examples have been seen on Mars, but this one, called "Egg Rock," is the first on Mars examined with a laser-firing spectrometer. To do so, the rover team used Curiosity's Chemistry and Camera (ChemCam) instrument.
    Researchers will be analyzing the ChemCam data from the first few laser shots at each target point and data from subsequent shots at the same point, to compare surface versus interior chemistry.
    VIRGO
    VIRGO --- ---
    Here's Our Response Plan for an Incoming Asteroid
    http://futurism.com/heres-our-response-plan-for-an-incoming-asteroid/
    NASA and FEMA have started training in anticipation of that very real threat. The two agencies recently held
    a series of exercises that tested readiness and possible response in the event of a large asteroid impacting Earth.

    In the hypothetical exercise, NASA and FEMA were posed with an object 100 to 250 meters striking Earth in 2020.
    The exercise didn’t give the agencies enough time to mount an asteroid deflection, but they could plan evacuations,
    the level of information dissemination, and ways to prevent panic.

    Discovery Channel - Large Asteroid Impact Simulation
    https://www.youtube.com/watch?v=bU1QPtOZQZU
    VIRGO
    VIRGO --- ---
    New flowchart to eliminate Universe models
    Leiden Institute of Physics - item
    http://www.physics.leidenuniv.nl/index.php?id=11573&news=990&type=LION&ln=EN

    Cosmologists have many possible models for the Universe, of which only one can be true. A new flowchart will eliminate
    some of them when two specific Universe features are accurately measured. Publication in Physical Review D on 7 November.

    Cosmologists try to understand how the entire Universe formed and evolves. In short, cosmology is the science of everything,
    except for that pale blue dot floating around in the vastness of space. By aiming their telescopes at distant galaxies and
    the afterglow of the Big Bang, cosmologists look back in time and pick up pieces of the puzzle. They put these pieces as
    parameters in the many possible models they have created for our Universe. The more parameters are precisely measured,
    the more models can be excluded.

    VIRGO
    VIRGO --- ---
    Solved: One of the mysteries of globular clusters | EurekAlert! Science News
    https://www.eurekalert.org/pub_releases/2016-11/idad-soo110816.php

    A study shows that the most massive stars in the last stages of their lives are those which contaminate the interstellar
    medium with new chemical elements, giving rise to successive generations of stars in these 'astronomical fossils'

    VIRGO
    VIRGO --- ---
    Researchers discover UGC 3672 galaxy to be an unusual merging triplet of gas-rich dwarf galaxies
    http://phys.org/news/2016-11-ugc-galaxy-unusual-merging-triplet.html

    Astronomers from India and Russia revealed new information about the composition of the galaxy UGC 3672. According to a paper published
    Nov. 4 on the arXiv pre-print server, UGC 3672 is actually a triplet of very gas-rich dwarf galaxies in the process of merging.

    UGC 3672 is located near the center of the nearby Lynx-Cancer intergalactic void. This void, which is about 59 million light years away
    from Earth, was recently a subject of detailed surveys due to its relative proximity. Lynx-Cancer gives scientists the opportunity to
    study galaxies to a much fainter mass and luminosity limit than have been done in more distant voids.

    VIRGO
    VIRGO --- ---
    New Theory of Gravity Might Explain Dark Mattter - Delta Institute for Theoretical Physics
    http://www.d-itp.nl/...r/press-releases/2016/11/new-theory-of-gravity-might-explain-dark-matter.html

    A new theory of gravity might explain the curious motions of stars in galaxies. Emergent gravity, as the new theory is called,
    predicts the exact same deviation of motions that is usually explained by inserting dark matter in the theory. Prof. Erik Verlinde,
    renowned expert in string theory at the University of Amsterdam and the Delta Institute for Theoretical Physics, published a new
    research paper today in which he expands his groundbreaking views on the nature of gravity.
    VIRGO
    VIRGO --- ---
    Ajaj... :-/
    'Millions' needed to continue Europe's Mars mission: ESA chief | Bangkok Post: news
    http://www.bangkokpost.com/...rld/1129473/millions-needed-to-continue-europes-mars-mission-esa-chief
    VIRGO
    VIRGO --- ---
    VIRGO
    VIRGO --- ---
    Giant Radio Telescope Turns to New-Found Nearby Planet - Astrobiology Magazine
    http://www.astrobio.net/alien-life/giant-radio-telescope-turns-new-found-nearby-planet/

    Breakthrough Listen, the 10-year, $100-million astronomical search for intelligent life beyond Earth launched in 2015 by Internet entrepreneur
    Yuri Milner and Stephen Hawking, today announced its first observations using the Parkes Radio Telescope in New South Wales, Australia.

    Parkes joins the Green Bank Telescope (GBT) in West Virginia, USA, and the Automated Planet Finder (APF) at Lick Observatory in California, USA, in
    their ongoing surveys to determine whether civilizations elsewhere have developed technologies similar to our own. Parkes radio telescope is part
    of the Australia Telescope National Facility, owned and managed by Australia’s Commonwealth Scientific and Industrial Research Organization (CSIRO).

    Drawing on over nine months of experience in operation of the dedicated Breakthrough Listen instrument at GBT, a team of scientists and engineers
    from the University of California, Berkeley’s SETI Research Center (BSRC) deployed similar hardware at Parkes, bringing Breakthrough Listen’s
    unprecedented search tools to a wide range of sky inaccessible from the GBT. The Southern Hemisphere sky is rich with targets, including the center
    of our own Milky Way galaxy, large swaths of the galactic plane, and numerous other galaxies in the nearby Universe.
    VIRGO
    VIRGO --- ---
    How Did the Milky Way Get Its Name?
    http://www.livescience.com/56756-milky-way-name-origin.html

    The earliest mentions of the Milky Way can be traced back to the ancient Greeks (800 B.C. to 500 B.C.),
    according to Matthew Stanley, a professor of the history of science at the Gallatin School of Individualized
    Study at New York University. But it's unclear exactly when the name emerged, he told Live Science.

    "The term was in common use in Western astronomy 2,500 years ago," Stanley said, referring to stargazers in
    European countries. "So there's no way of knowing who first coined it and how it first came to be. It's one
    of those terms that's so old that its origin is generally forgotten by now."

    In fact, Stanley added, the Milky Way provided astronomers with the Greek root for the astronomical term "galaxy."

    "'Galactos' literally means 'the milky thing in the sky,'" Stanley said.

    VIRGO
    VIRGO --- ---
    James Webb Space Telescope Update
    https://www.youtube.com/watch?v=VWeg88PTg4s
    VIRGO
    VIRGO --- ---
    A Pulsar and White Dwarf in an Unexpected Orbit
    http://aasnova.org/2016/11/02/a-pulsar-and-white-dwarf-in-an-unexpected-orbit/
    Astronomers have discovered a binary system consisting of a low-mass white dwarf and a millisecond
    pulsar — but its eccentric orbit defies all expectations of how such binaries form.

    Kliknutím sem můžete změnit nastavení reklam