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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VIRGO
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    Husté týdny pro TMT! Držím palce, až je mám fialové...

    ICYMI: here's Douglas' thoughts on the first day of the contested case.
    TMT Contested Case Hearing Update 10/20/2016
    https://www.youtube.com/watch?v=MJ3HRgiD25o
    VIRGO
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    'Heartbeat Stars' Unlocked in New Study
    http://www.nasa.gov/feature/jpl/heartbeat-stars-unlocked-in-new-study

    Heartbeat stars, discovered in large numbers by NASA's Kepler space telescope, are binary stars (systems of two stars orbiting each other)
    that got their name because if you were to map out their brightness over time, the result would look like an electrocardiogram, a graph of
    the electrical activity of the heart. Scientists are interested in them because they are binary systems in elongated elliptical orbits.
    This makes them natural laboratories for studying the gravitational effects of stars on each other.

    In a heartbeat star system, the distance between the two stars varies drastically as they orbit each other. Heartbeat stars can get as close
    as a few stellar radii to each other, and as far as 10 times that distance during the course of one orbit.

    At the point of their closest encounter, the stars’ mutual gravitational pull causes them to become slightly ellipsoidal in shape, which is
    one of the reasons their light is so variable. This is the same type of "tidal force" that causes ocean tides on Earth. By studying heartbeat
    stars, astronomers can gain a better understanding of how this phenomenon works for different kinds of stars.

    Tidal forces also cause heartbeat stars to vibrate or "ring" -- in other words, the diameters of the stars rapidly fluctuate as they orbit
    each other. This effect is most noticeable at the point of closest approach.

    VIRGO
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    Space Images | Changing Colors in Saturn's North
    http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA21049

    VIRGO
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    Double star may light up the sky as rare red nova in six years | New Scientist
    https://www.newscientist.com/...0005-double-star-may-light-up-the-sky-as-rare-red-nova-in-six-years/

    A dim binary star is behaving exactly as expected if it is about to explode as a “red nova“. If that happens,
    in 2022 or so it could shine as brightly as the North Star.

    Dozens of ordinary novae – the temporary flare-ups of white dwarf stars stealing gas from their companion star –
    explode in our galaxy every year. These novae turn blue.

    In recent years, however, astronomers have discovered a rare type of nova that turns red instead.
    At peak brightness, many red novae rival the most luminous stars in the galaxy.

    A red nova in 2008 gave us a clue as to why these explosions happen: observations made before the blast revealed
    that the nova was the result of two stars orbiting each other merging into one.
    VIRGO
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    Kepler finds scores of planets around cool dwarf stars : Nature News & Comment
    http://www.nature.com/news/kepler-finds-scores-of-planets-around-cool-dwarf-stars-1.20853

    NASA’s Kepler observatory has spotted 20 planets that orbit cool, small stars — the largest such haul so far. These long-lived stars,
    known as K and M dwarfs, are ubiquitous in the Milky Way and could turn out to host numerous habitable planets.

    After the Kepler spacecraft experienced a mechanical failure in 2013 that made it impossible for it to keep observing its original targets,
    astronomers gave it a new mission, called K2. It now uses pressure from sunlight to help stabilize the craft. The latest observations with
    K2 revealed 87 planet candidates, on top of 667 previously announced candidates, almost all with sizes between those of Mars and Neptune.

    Although the original Kepler mission examined many Sun-like stars, the majority of stars in our Galaxy are smaller, fainter, cooler stars,
    known as red dwarfs. Such stars make up nearly half the targets of the K2 mission. “There are more than 250 of them within 30 light-years —
    all over the place — which is why some other astronomers here might call them the vermin of the sky,” says Courtney Dressing, an astrophysicist
    at the California Institute of Technology in Pasadena who presented the research at a joint meeting of the American Astronomical Society's
    Division for Planetary Sciences and the European Planetary Science Congress in Pasadena on 19 October.
    VIRGO
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    A Simple Response to an Elemental Message has now reached 2000 AU (299,195,741,382 km), the estimated closest boundary to
    the Oort cloud or the Solar System's outer shell. It may take a while to get surpass this region, estimated to be 50,000 AU thick (~0.79ly).
    Distance estimates sourced via; Morbidelli, A. (2005) 'Origin and Dynamical Evolution of Comets and their Reservoirs'

    VIRGO
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    Glory, Coronae, Spectre Of The Brocken
    Taken by Mila Zinkova on October 21, 2016 @ San Francisco, California, USA

    VIRGO
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    Photonics Dawning as the Communications Light For Evolving NASA Missions
    https://www.nasa.gov/...016/photonics-dawning-as-the-communications-light-for-evolving-nasa-missions

    A largely unrecognized field called photonics may provide solutions to some of NASA’s most pressing challenges in future spaceflight.

    Photonics explores the many applications of generating, detecting and manipulating photons, or particles of light that, among other things,
    make up laser beams. On this day in 1983, the General Conference of Weights and Measures adopted the accepted value for the speed of light,
    an important photonics milestone. Oct. 21, 2016, is Day of Photonics, a biennial event to raise awareness of photonics to the general public.
    The study has multiple applications across NASA missions, from space communications to reducing the size of mission payloads to performing
    altitude measurements from orbit.

    VIRGO
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    Volcanic eruptions tracked on Jupiter moon Io
    https://www.youtube.com/watch?v=LRFSVn369w0


    Our Best Map Yet of Io's Volcanic Activity Looks Terrifying
    http://gizmodo.com/our-best-map-yet-of-ios-insane-volcanic-activity-looks-1788071994

    Jupiter’s moon Io is the most volcanically-active body in our solar system, and a recent observational campaign
    offers a little more insight into the a terrifying hellscape that awaits any unfortunate space probes we send there.

    A team of astronomers at UC Berkeley has just completed a two and a half year survey of Jupiter’s eruptive satellite Io,
    using the near infrared optical capabilities of the Keck II and Gemini North telescopes at Mauna Kea, Hawaii. The result
    is the first high-resolution time series of volcanic hot spots on Io, a world about the size of our moon that features
    hundreds of active volcanoes and a few mind-bogglingly vast lava lakes.

    VIRGO
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    13.7 Billion Years Of Galaxy Formation In 44.2 Seconds | Simulation
    https://www.youtube.com/watch?v=ZatSnkp72-w
    VIRGO
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    Hotspots in an Active Galactic Nucleussu201641 | www.cfa.harvard.edu/
    https://www.cfa.harvard.edu/news/su201641

    The nucleus of a so-called "active" galaxy contains a massive black hole that is vigorously accreting material.
    As a result, the nucleus often ejects bipolar jets of rapidly moving charged particles that radiate brightly at
    many wavelengths, in particular radio wavelengths. Active galaxies display a range of dramatically different
    properties, and the ones that are bright in the radio can beam as much as one trillion solar luminosities of
    radiation into space at those wavelengths.

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    VIRGO
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    A time lapse of DSS 43 as it was tracking TGO on approach to Mars' orbit - 19th October 2016.

    DSS43 Tracking @ESA_TGO 19Oct16
    https://www.youtube.com/watch?v=WGWYVT_lFMk
    VIRGO
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    Steering the Voyager Golden Record back to Earth
    http://thevinylfactory.com/vinyl-factory-releases/voyager-golden-record-interview/

    As the Kickstarter campaign to release a 40th anniversary box set draws to its conclusion, exceeding its target five-fold and raising $1.2million
    at time of publication, we caught up with David Pescovitz to talk about why the Voyager Golden Record still resonates with so many people.

    VIRGO
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    The Most Efficient Way to Destroy the Universe – False Vacuum
    https://www.youtube.com/watch?v=ijFm6DxNVyI
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    Schiaparelli crash probably caused by software glitch. Good news if hardware worked OK.
    ExoMars-2016 Mars landing
    http://russianspaceweb.com/exomars2016-edm-landing.html

    VIRGO
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    Celebrate the Large and Long Program! - Gemini Observatory
    http://www.gemini.edu/blog/blog/2016/10/21/celebrate-the-large-and-long-program/

    The Large and Long Program (LLP) is one of five observing modes Gemini offers to users of our telescopes. These five modes categorize projects
    based on length and weather conditions required for the observations. Classically, Gemini accepts proposals on a six month basis and awarded
    recipients complete their observations within that given semester. Large and Long Programs, on the other hand, provide more flexibility for long
    term research and last anywhere from one to three years. This extended time frame promotes collaboration across communities and produces significant
    and high-impact science. Here, we ask current Large and Long Programs to share a little about their research and experience with Gemini Observatory.

    VIRGO
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    Mars Reconnaissance Orbiter views Schiaparelli landing site / ExoMars / Space Science / Our Activities / ESA
    http://www.esa.int/...ce_Science/ExoMars/Mars_Reconnaissance_Orbiter_views_Schiaparelli_landing_site
    NASA’s Mars Reconnaissance Orbiter has identified new markings on the surface of the Red Planet that are believed
    to be related to ESA’s ExoMars Schiaparelli entry, descent and landing technology demonstrator module.

    VIRGO
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    The universe is expanding at an accelerating rate—or is it?
    http://phys.org/news/2016-10-universe-rateor.html

    Five years ago, the Nobel Prize in Physics was awarded to three astronomers for their discovery, in the late 1990s,
    that the universe is expanding at an accelerating pace.

    Their conclusions were based on analysis of Type Ia supernovae - the spectacular thermonuclear explosion of dying stars -
    picked up by the Hubble space telescope and large ground-based telescopes. It led to the widespread acceptance of the idea
    that the universe is dominated by a mysterious substance named 'dark energy' that drives this accelerating expansion.

    Now, a team of scientists led by Professor Subir Sarkar of Oxford University's Department of Physics has cast doubt on this
    standard cosmological concept. Making use of a vastly increased data set - a catalogue of 740 Type Ia supernovae, more than
    ten times the original sample size - the researchers have found that the evidence for acceleration may be flimsier than
    previously thought, with the data being consistent with a constant rate of expansion.
    VIRGO
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    Found: Oldest known planet-forming disk | Carnegie Institution for Science
    https://carnegiescience.edu/news/found-oldest-known-planet-forming-disk

    A group of citizen scientists and professional astronomers, including Carnegie’s Jonathan Gagné, joined forces to discover an unusual hunting ground for exoplanets.
    They found a star surrounded by the oldest known circumstellar disk—a primordial ring of gas and dust that orbits around a young star and from which planets can form
    as the material collides and aggregates.

    The discovery relied on citizen scientists from Disk Detective, a project led by NASA/GSFC's Dr. Marc Kuchner that’s designed to find new circumstellar disks. At the
    project’s website, DiskDetective.org, users make classifications by viewing ten-second videos of data from NASA surveys, including the Wide-field Infrared Survey
    Explorer mission (WISE) and Two-Micron All Sky Survey (2MASS) projects. Since the launch of the website in January 2014, roughly 30,000 citizen scientists have
    participated in this process, performing roughly 2 million classifications of celestial objects.
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