• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
    VIRGO --- ---
    Tak dnes na webu ze tří zdrojů velké nadšení z (před)premiéry. Je na čase to shlédnout!

    The science behind the twisting alien linguistics of Arrival | New Scientist
    https://www.newscientist.com/...109339-the-science-behind-the-twisting-alien-linguistics-of-arrival/

    Arrival Trailer (2016) - Paramount Pictures
    https://www.youtube.com/watch?v=tFMo3UJ4B4g
    VIRGO
    VIRGO --- ---
    Durban Experiences the Real Search for ET
    https://www.youtube.com/watch?v=VUmVz3Bw4LY
    VIRGO
    VIRGO --- ---
    Cassini To Probe Nanograins in Saturn's Rings Prior To End Of Mission
    https://arxiv.org/abs/1611.02621

    VIRGO
    VIRGO --- ---
    WOOOW!!

    Tak nejenže je zatím nejasná doba přechodu na kratší ob. dráhu, v NASA dokonce diskutují o možnosti, že by na ni sonda vůbec nepřešla.
    Nikterak by to prý nemělo omezit množství plánované vědecké práce. Sice by přístroje prováděly většinu měření pouze v době několikahodinové
    periapsidy, ale tím jak by se po většinu času pohybovalo Juno ve větších vzdálenostech od oblastí tvrdého záření, mohla by se celá mise
    prodloužit až do roku 2019, a možná i dál.

    Plánovaný zážeh 11. prosince byl zrušen, a je možné, že už se nikdy žádný další neuskuteční.

    Prodloužení do r. 19/20 nic nebrání kromě faktu, že někdy v polovině 2019 se sonda ocitne po dobu asi 10 hodin v zákrytu planetou, slun.
    panely nebudou dostávat dost slun. světla a radikálně poklesne teplota. Podobná situace se už stala, ale nikdy po tak dlouhou dobu,
    proto se letová kontrola snaží přijít na to, jak se tomu elegantně vyhnout (pokud bude v té době sonda ještě funkční).
    VIRGO
    VIRGO --- ---
    VIRGO
    VIRGO --- ---
    https://www.wired.com/2016/11/nasa-will-choose-first-mars-faring-astronauts/

    CHRISTINE CORBETT MORAN was in Antarctica when she got the news: NASA wanted to interview her, in person, for the next class of astronauts.
    Moran is a coder and theoretical astrophysicist, and she’d been holed up in the southernmost part of the world for 10 months, studying the
    echoes of the Big Bang. She was scheduled to leave the coldest continent in November anyway, so four days after NASA rang, on October 18,
    she booked the five flights necessary to get to Houston and sell her qualifications to space-agency officials.

    Moran—who has worked in propulsion at SpaceX , co-led creation of the iOS version of the encrypted communication app Signal, and minored in
    philosophy—probably wouldn’t have been as attractive an astronaut candidate historically as she is today. But NASA’s missions have evolved.
    When the agency put out its latest application call, it specified that the lucky few might fly in Orion, a deep-space vessel meant to make
    the #journeytomars. And that kind of long, tight, potentially science-centric job lends itself to a different resume than astronaut calls
    past. Say, someone who knows science and software and can stay sane at the South Pole.

    VIRGO
    VIRGO --- ---
    https://news.agu.org/press-release/australian-continent-shifts-with-the-seasons-study-finds/

    Australia shifts and tilts back and forth by several millimeters each year because of changes to the Earth’s center of mass,
    according to a new study. The findings could help scientists better track the precise location of Earth’s center of mass,
    which is important for GPS and other satellite measurements, according to the study’s author.

    All bodies have a center of mass, or the average position of the mass of an object. Earth’s center of mass lies roughly at
    the center of the planet’s molten core, about 6,000 kilometers (about 3,700 miles) beneath the surface.

    VIRGO
    VIRGO --- ---
    Soft Capture Mechanism | ESA/Hubble
    http://www.spacetelescope.org/images/soft_capture_device/
    Shown here in the top center is the Soft Capture Mechanism - the ring-like device that attaches to Hubble’s aft bulkhead.

    VIRGO
    VIRGO --- ---
    Richard Dawkins and Other Prominent Scientists React to Trump's Win - Scientific American
    https://www.scientificamerican.com/...ins-and-other-prominent-scientists-react-to-trump-rsquo-s-win/
    What the election results mean for science, in gut responses from Scientific American’s Board of Advisers
    VIRGO
    VIRGO --- ---
    Astronomer Damian Peach photographed Jupiter over five nights in March 2016 shortly after its opposition to assemble this movie of
    the giant planet's appearance. This opposition coincided with Juno's approach to Jupiter. The animation is also available on Youtube.
    Great whirling Jupiter | The Planetary Society
    http://www.planetary.org/blogs/emily-lakdawalla/2016/11100923-great-whirling-jupiter.html

    VIRGO
    VIRGO --- ---
    Hubble Steals a Look at a Hungry Giant
    https://www.nasa.gov/image-feature/goddard/2016/hubble-steals-a-look-at-a-hungry-giant

    NGC 1222, seen in this image taken with the Wide Field Camera 3 on board the NASA/ESA Hubble Space Telescope is a galaxy with a rather
    eventful story to tell. NGC 1222 has been described as a peculiar example of a type of galaxy known as a lenticular galaxy.

    Astronomers think that NGC 1222 is in the process of swallowing up two much smaller dwarf galaxies that strayed too close to it. It is likely that
    the encounter was the trigger for the starburst in NGC 1222, bringing in fresh supplies of gas that are now fueling the burst of star formation.

    VIRGO
    VIRGO --- ---
    NASA — The James Webb Space Telescope: A Story of Art &...
    http://nasa.tumblr.com/post/152962662834/the-james-webb-space-telescope-a-story-of-art

    VIRGO
    VIRGO --- ---
    Supernova 2016gxp in NGC 51

    VIRGO
    VIRGO --- ---
    Exoplanet Exploration: Planets Beyond our Solar System: NASA space telescopes pinpoint elusive brown dwarf
    https://exoplanets.nasa.gov/news/1396/nasa-space-telescopes-pinpoint-elusive-brown-dwarf/

    In a first-of-its-kind collaboration, NASA's Spitzer and Swift space telescopes joined forces to observe a microlensing event, when a distant star brightens
    due to the gravitational field of at least one foreground cosmic object. This technique is useful for finding low-mass bodies orbiting stars, such as planets.
    In this case, the observations revealed a brown dwarf.

    Brown dwarfs are thought to be the missing link between planets and stars, with masses up to 80 times that of Jupiter. But their centers are not hot or dense
    enough to generate energy through nuclear fusion the way stars do. Curiously, scientists have found that, for stars roughly the mass of our sun, less than
    1 percent have a brown dwarf orbiting within 3 AU (1 AU is the distance between Earth and the sun). This phenomenon is called the "brown dwarf desert."

    The newly discovered brown dwarf, which orbits a host star, may inhabit this desert. Spitzer and Swift observed the microlensing event after being tipped off
    by ground-based microlensing surveys, including the Optical Gravitational Lensing Experiment (OGLE). The discovery of this brown dwarf, with the unwieldy name
    OGLE-2015-BLG-1319, marks the first time two space telescopes have collaborated to observe a microlensing event.

    VIRGO
    VIRGO --- ---
    Topics - New Detective Instrument Captures Chemical Signatures of Planets - Subaru Telescope
    http://subarutelescope.org/Topics/2016/11/09/index.html

    A team of scientists and engineers led by Princeton University researchers recently reported the successful operation of a new instrument
    for the Subaru Telescope that will allow astronomers to make direct observations and take spectra of planets orbiting nearby stars.

    The instrument, dubbed CHARIS (Coronagraphic High Angular Resolution Imaging Spectrograph), was designed and built by a team led by Professor
    N. Jeremy Kasdin. It allows astronomers to isolate light from planets larger than Jupiter going around a star other than the Sun and then
    analyze the light to determine the planets' atmospheric constituents. The recent observation is known in the astronomical community as a
    "first light," a first test of the instrument on the telescope to capture light from the universe that demonstrates it is operating successfully.

    VIRGO
    VIRGO --- ---
    Impostor planet exposed by astronomers
    http://phys.org/news/2016-11-impostor-planet-exposed-astronomers.html

    Don't be fooled by its light curve exhibiting anomalies like those caused by planets—one microlensing event with a fancy name OGLE-2016-BLG-0733
    is doing a really good job of mimicking an extrasolar world. This case of a binary-source event masquerading as a planet could have further
    implications for the search of exoplanets using the gravitational microlensing method.

    In contrast to other methods, microlensing is most sensitive for detecting planets around one to 10 AU away from their host stars. This method
    is also used to find new exoworlds around faint and dark objects at or beyond the snow line, and those not gravitationally bound to their parent
    stars. However, the correct interpretation of the signal provided by the microlensing method is often difficult due to various scenarios that
    can mimic planetary signals.

    VIRGO
    VIRGO --- ---
    LSST camera - The largest camera for astronomy
    https://lsst.slac.stanford.edu/

    VIRGO
    VIRGO --- ---
    Přístroj SPHERE odhaluje protoplanetární disky modelované nově zrozenými planetami
    Formování planetárních systémů | ESO Česko
    https://www.eso.org/public/czechrepublic/news/eso1640/?lang

    Nová detailní pozorování pomohla odhalit působivé struktury v protoplanetárních discích kolem mladých hvězd. Přístroj SPHERE, který pracuje ve spojení
    s dalekohledem ESO/VLT, vědcům umožnil zkoumat složité dynamické procesy v mladých planetárních systémech. U jedné ze sledovaných soustav byl dokonce
    pozorován vývoj doslova v reálném čase. Nedávno publikované výsledky získané trojicí vědeckých týmů dokládají mimořádné schopnosti přístroje SPHERE, který
    umožňuje přímo pozorovat, jakým způsobem planety formují disky, ze kterých se rodí. Odhaluje tak komplexnost prostředí, ve kterém se nové světy utvářejí.

    Moderní přístroj SPHERE, který pracuje ve spojení s dalekohledem ESO/VLT (Very Large Telescope) na observatoři Paranal (Paranal Observatory) v Chile, je
    určen k pátrání po exoplanetách (exoplanets). Trojice vědeckých týmů jej nedávno použila ve snaze po odhalení tajemství vývoje mladých planetárních systémů.
    Extrémní nárůst počtu známých exoplanet v uplynulých letech učinil z jejich výzkumu jeden z nejdynamičtěji se rozvíjejících oborů moderní astronomie

    VIRGO
    VIRGO --- ---
    http://phys.org/news/2016-11-comet-67pchuryumov-gerasimenko-younger-previously-thought.html

    Based on computer simulations, astrophysicists at the University of Bern, Switzerland, conclude that the comet Chury
    did not obtain its duck-like form during the formation of our solar system 4.5 billion years ago. Although it does contain
    primordial material, they are able to show that the comet in its present form is hardly more than a billion years old.

    VIRGO
    VIRGO --- ---
    Corey S. Powell: Pluto is a twilight world. Processing by New Horizons IMG pierces the gloom to reveal new details on the night side.

    Kliknutím sem můžete změnit nastavení reklam