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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
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    Can Organisms Sense via Radio Frequency? | Scripps Institution of Oceanography, UC San Diego
    https://scripps.ucsd.edu/news/can-organisms-sense-radio-frequency

    A new project by researchers at the University of California San Diego will investigate a biological mystery that has so far gone unsolved: can organisms use radio frequencies to sense surroundings?

    Radio frequency waves (RF) are electromagnetic waves between the frequencies of 3 kilohertz to 300 gigahertz, used in radio, cellphones, wi-fi, radar, GPS, and many other systems. While humans have
    used RF technology to communicate for over 100 years, no living organism has ever been observed using RF to communicate without technology.

    But recently there have been clues that this may in fact occur.

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    A Tour of the Zoomable Universe by Caleb Scharf and Ron Miller | Quanta Magazine
    https://www.quantamagazine.org/...-of-the-zoomable-universe-by-caleb-scharf-and-ron-miller-20171106/
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    VIRGO: https://www.centauri-dreams.org/?p=38679

    Just how elaborate is the planetary system around the nearest star? It’s a question rendered more interesting this morning by the news that the ALMA
    Observatory in Chile has now detected dust in the system in an area one to four times as far from Proxima Centauri as the Earth is from the Sun.
    Moreover, there are signs of what may be an outer dust belt, an indication that while we have already discovered Proxima Centauri b, we are looking
    at a system in which cold particles and debris that could have formed other planets continue to accompany the star.

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    Chandra :: Photo Album :: Jupiter :: November 6, 2017
    http://chandra.harvard.edu/photo/2017/jupiter/

    A Quick Look at Jupiter's Auroras
    https://www.youtube.com/watch?v=P48vGm0q4a4


    New X-ray observations show the auroras — northern or southern lights — on Jupiter behave differently at each pole.

    This makes Jupiter puzzling and unlike Saturn (no known auroras) or Earth (where north and south pole auroras mirror one another).

    These latest X-ray findings are challenging the current theoretical models that explain the Jovian auroras.

    Scientists hope to combine Chandra, XMM-Newton, and Juno data to learn more about the source of Jupiter's auroras.

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    Tracing the Fuel for Forming Stars
    http://aasnova.org/2017/11/03/tracing-the-fuel-for-forming-stars/

    Huge reservoirs of cold hydrogen gas — the raw fuel for star formation — lurk in galaxies throughout the universe.
    A new study examines whether these reservoirs have always been similar, or whether those in distant galaxies are
    very different from those in local galaxies today.

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    Extremely massive exoplanet discovered in the Milky Way's bulge
    https://phys.org/news/2017-11-extremely-massive-exoplanet-milky-bulge.html

    As a result of NASA's Spitzer Space Telescope observations of a microlensing event, astronomers have found an extremely massive alien world
    circling a star located in the Milky Way's bulge. The newly discovered planet, designated OGLE-2016-BLG-1190Lb, is the first Spitzer
    microlensing exoworld residing in the galactic bulge. The finding was presented October 27 in a paper published on arXiv.org.

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    http://www.umass.edu/newsoffice/article/using-powerful-new-telescope-astronomers

    Astronomers using the Large Millimeter Telescope (LMT), which is operated jointly by the University of Massachusetts Amherst and Mexico’s
    Instituto Nacional de Astrofísica, Óptica y Electrónica, report today in Nature Astronomy that they have detected the second most distant
    dusty, star-forming galaxy ever found in the universe – born in the first one billion years after the Big Bang.

    It is the oldest object ever detected by the LMT, says astrophysicist Min Yun at UMass Amherst, and at present there is only one other,
    slightly older and more distant object like this known.

    “The Big Bang happened 13.7 billion years ago, and now we are seeing this galaxy from 12.8 billion years ago, so it was forming within
    the first billion years after the Big Bang,” he points out. “Seeing an object within the first billion years is remarkable because the
    universe was fully ionized, that is, it was too hot and too uniform to form anything for the first 400 million years. So our best guess
    is that the first stars and galaxies and black holes all formed within the first half a billion to one billion years. This new object
    is very close to being one of the first galaxies ever to form.”

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    https://www.nasa.gov/image-feature/jpl/pia21355/pandora-the-would-be-perturber

    This view looks toward the sunlit side of the rings from about 28 degrees above the ringplane.
    The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 14, 2017.

    The view was obtained at a distance of approximately 360,000 miles (577,000 kilometers) from Pandora
    and at a Sun-Pandora-spacecraft, or phase, angle of 119 degrees. Image scale is about 2.2 miles (3.5
    kilometers) per pixel.

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    Heating ocean moon Enceladus for billions of years / Cassini-Huygens / Space Science / Our Activities / ESA
    http://www.esa.int/...ace_Science/Cassini-Huygens/Heating_ocean_moon_Enceladus_for_billions_of_years

    Enough heat to power hydrothermal activity inside Saturn’s ocean moon Enceladus for billions of years could be generated through tidal
    friction if the moon has a highly porous core, a new study finds, working in favour of the moon as a potentially habitable world.

    A paper published in Nature Astronomy today presents the first concept that explains the key characteristics of 500 km-diameter Enceladus
    as observed by the international Cassini spacecraft over the course of its mission, which concluded in September.

    This includes a global salty ocean below an ice shell with an average thickness of 20–25 km, thinning to just 1–5 km over the south polar
    region. There, jets of water vapour and icy grains are launched through fissures in the ice. The composition of the ejected material measured
    by Cassini included salts and silica dust, suggesting they form through hot water – at least 90ºC – interacting with rock in the porous core.

    These observations require a huge source of heat, about 100 times more than is expected to be generated by the natural decay of radioactive
    elements in rocks in its core, as well as a means of focusing activity at the south pole.

    The tidal effect from Saturn is thought to be at the origin of the eruptions deforming the icy shell by push-pull motions as the moon follows
    an elliptical path around the giant planet. But the energy produced by tidal friction in the ice, by itself, would be too weak to counterbalance
    the heat loss seen from the ocean – the globe would freeze within 30 million years.

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    A message from Joan Schmelz, director of USRA at Arecibo, via Rhysy

    https://plus.google.com/+RhysTaylorRhysy/posts/bYCMZFHxEBq

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    Yasushi yede! October 26, 2017 @ Ishikawa, JAPAN

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    ALMA objevila chladný prach v okolí nejbližší hvězdy | ESO Česko
    http://www.eso.org/public/czechrepublic/news/eso1735/?lang

    Radioteleskop ALMA pro milimetrovou a submilimetrovou oblast elektromagnetického záření pracující v Chile detekoval prach v okolí nejbližší sousední hvězdy Proximy Centauri.
    Nová pozorování odhalila, že záření chladných prachových částic vychází z oblasti, která by se ve Sluneční soustavě rozkládala od oběžné dráhy Země až téměř k Jupiteru.
    Navíc se zdá, že v soustavě Proximy může být ještě jeden o něco chladnější vnější prachový pás. Tyto oblasti by mohly být známkou přítomnosti komplexního planetárního systému.
    Jelikož se očekává, že částice v těchto oblastech jsou tvořeny horninami a ledem, jsou pozorované struktury nejspíše podobné mohutnějším pásům meziplanetární hmoty, jaké známe
    ze Sluneční soustavy , kde se rovněž jedná o zbytky látky nespotřebované při vzniku a vývoji planet.

    Artist’s impression of the dust belts around Proxima Centauri
    https://www.youtube.com/watch?v=GrYvTBZ6j20
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    https://www.nasa.gov/feature/goddard/2017/return-of-the-comet-96p-spotted-by-esa-nasa-satellites

    The ESA (European Space Agency) and NASA mission SOHO — short for Solar and Heliospheric Observatory — got a visit from an old friend this week
    when comet 96P entered its field of view on Oct. 25, 2017. The comet entered the lower right corner of SOHO’s view, and skirted up and around
    the right edge before leaving on Oct. 30. SOHO also spotted comet 96P in 1996, 2002, 2007 and 2012, making it the spacecraft’s most frequent
    cometary visitor.

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    A/2017 U1 centered in this 5 minute exposure recorded with the William Herschel Telescope in the Canary Islands on October 28

    APOD: 2017 November 3 - A 2017 U1: An Interstellar Visitor
    https://apod.nasa.gov/apod/ap171103.html

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    The most ancient spiral galaxy confirmed | Swinburne news
    http://www.swinburne.edu.au/...most-ancient-spiral-galaxy-confirmed-using-cutting-edge-technique.php

    The most ancient spiral galaxy discovered to date is revealing its secrets to a team of astronomers at Swinburne University of Technology and
    The Australian National University (ANU), part of the Australian Research Council Centre of Excellence in All Sky Astrophysics in 3D (ASTRO 3D).

    The galaxy, known as A1689B11, existed 11 billion years in the past, just 2.6 billion years after the Big Bang, when the Universe was only one
    fifth of its present age. It is thus the most ancient spiral galaxy discovered so far.

    The researchers used a powerful technique that combines gravitational lensing with the cutting-edge instrument the Near-infrared Integral Field
    Spectrograph (NIFS) on the Gemini North telescope in Hawai‘i to verify the vintage and spiral nature of this galaxy. NIFS is Australia’s first
    Gemini instrument that was designed and built by the late Peter McGregor at The ANU.

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    https://www.nasa.gov/...picture-this-selfi-nasa-advances-instrument-to-study-the-plumes-of-enceladus

    The team at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, recently received support to advance technologies needed
    for the Submillimeter Enceladus Life Fundamentals Instrument, or SELFI. This remote-sensing instrument represents a significant
    improvement over the current state-of-the-art in submillimeter-wavelength devices, said SELFI Principal Investigator Gordon Chin.

    SELFI is being designed to measure traces of chemicals in the plumes of water vapor and icy particles that emanate from fissures,
    also known as tiger stripes, on Enceladus, Saturn’s sixth largest moon. By studying the plumes, scientists believe they can
    extrapolate the composition of the ocean that lies beneath the moon’s icy crust and its potential to host extraterrestrial life.

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    https://www.nasa.gov/...re/goddard/2017/atmospheric-beacons-guide-nasa-scientists-in-search-for-life

    Traditionally, researchers have sought potential biosignatures as ways of identifying inhabited worlds: byproducts from life as we know it
    such as oxygen or methane that over time accumulate in the atmosphere to detectable amounts. But with current technology, according to Vladimir
    Airapetian, lead author of a Nature Scientific Reports study published on Nov. 2, 2017, identifying these gases on distant terrestrial exoplanets
    is time-consuming, requiring days of observation time. The new study suggests hunting for cruder signatures of potentially habitable worlds instead,
    which would be easier to detect with current resources in less time.

    “We’re in search of molecules formed from fundamental prerequisites to life — specifically molecular nitrogen, which is 78 percent of our atmosphere,”
    said Airapetian, who is a solar scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and at American University in Washington, D.C.
    “These are basic molecules that are biologically friendly and have strong infrared emitting power, increasing our chance of detecting them.”

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    Hyde Park Civilizace: Miloslav Druckmüller — Česká televize
    http://www.ceskatelevize.cz/porady/10441294653-hyde-park-civilizace/217411058091104/
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