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    VIRGOCosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
    VINCENT_BU
    VINCENT_BU --- ---
    +3
    nevím, zda to už zde někde nebylo; odkaz na telemetrii v reálném čase "Where is Cassini now?"
    VIRGO
    VIRGO --- ---
    NASA JPL Live
    https://www.youtube.com/watch?v=gs-dscW95PE
    VIRGO
    VIRGO --- ---
    NASA Awards New Cooperative Agreement to W. M. Keck Observatory W. M. Keck Observatory
    http://www.keckobservatory.org/recent/entry/NASA_Agreement

    NASA has awarded a five-year Cooperative Agreement with the California Association for Research in Astronomy to continue the science program at the W. M. Keck Obs.

    “The Keck Observatory has unique, world-class capabilities that we consider essential to realize the scientific potential of many NASA missions, both ongoing and planned,”
    said Paul Hertz, director of the Astrophysics Division at NASA Headquarters. “NASA’s continuing partnership with Keck will ensure that astronomers and planetary scientists
    can carry out important ground-based observations necessary for the success of NASA missions and their scientific objectives.”

    The Keck Observatory is privately owned; in 1994 NASA contributed to the observatory and has been a partner ever since.

    Under the new agreement, which takes effect March 1, 2018 through February 28, 2023, Keck Observatory will support upcoming NASA missions, including:

    James Webb Space Telescope
    Transiting Exoplanet Survey Satellite (TESS)
    Wide Field Infrared Survey Telescope (WFIRST)
    Euclid (ESA)
    Mars 2020
    Explorers Program: Medium-Class Explorers (MIDEX), Small Explorers (SMEX)
    Planetary Missions: Discovery, New Frontiers

    VIRGO
    VIRGO --- ---
    HARPS data release #3, independent analyzes & more – Red Dots
    https://reddots.space/harps-data-release-3-independent-analyzes-more/

    This unusual Picture of the Week showcases the latest data gathered by ESO’s exoplanet hunter, the High Accuracy Radial velocity Planet Searcher (HARPS),
    during the ongoing Red Dots campaign, a search for terrestrial planets around our nearest three red dwarf stars: Proxima Centauri, Barnard’s Star, and Ross 154.
    The campaign was launched earlier in 2017 to build on the 2016 discovery of Proxima b around our nearest stellar neighbour, Proxima Centauri. Red Dots is designed
    as an open notebook science experiment, meaning the public has access to the data and can even contribute observations. Can you see a new exoplanet in these data
    of Proxima Centauri?

    VIRGO
    VIRGO --- ---
    Cassini - dnešní souhrn (včetně upřesnění přenosů v GMT/SELČ)

    http://www.esa.int/...ctivities/Space_Science/Cassini-Huygens/How_to_follow_Cassini_s_end_of_mission

    http://www.planetary.org/...ss-room/releases/2017/media-resources-cassini-grand-finale-coverage.html

    https://www.nasa.gov/...d/2017/excitement-and-tears-as-nasa-goddard-team-prepares-for-cassini-finale

    https://www.youtube.com/watch?v=DIE-cSGVYuI
    VIRGO
    VIRGO --- ---
    +2
    https://www.nasa.gov/feature/goddard/2017/keeping-nasa-s-james-webb-space-telescope-in-the-dark

    This bunny-suited technician is performing the important task of ensuring no unwanted infrared light interferes
    with the optical testing of NASA’s JWST inside of Chamber A at NASA’s Johnson Space Center in Houston.

    Because of the Webb telescope’s extreme sensitivity to infrared light, the shroud was made nearly impervious
    to outside light sources that could contaminate the testing.

    VIRGO
    VIRGO --- ---
    +3
    The WTF Star Strikes Again
    http://aasnova.org/2017/09/12/the-wtf-star-strikes-again/

    Boyajian’s star loves the limelight. It splashed onto the astronomical scene in 2015 by dimming dramatically and messily, much more messily than can be
    explained by a transiting planet. In 2016, astronomers realized that this sensational debut was only the latest act in a century-long fade, confirmed by
    exquisite observations from the Kepler mission. And the drama keeps building — just this summer, Boyajian’s star has undergone (and is still undergoing!)
    three more dimmings, similar in shape to the dimmings reported in 2015.

    This week, Boyajian’s star is back in the news again, the subject of two new studies. The first confirms that the slow fade observed by Kepler is happening
    across a broad range of colors. The second, which we’ll explore in today’s bite, points out that this consistent fade might not be so consistent after all...

    VIRGO
    VIRGO --- ---
    Observatoř Arecibo přežila hurikán Irma bez úhony!
    Arecibo Survives Hurricane Irma: 2nd-Largest Radio Telescope Still Standing
    https://www.space.com/38081-arecibo-observatory-survives-hurricane-irma.html

    Na snímcích přípravné práce před úderem bouře z min. týdne.

    VIRGO
    VIRGO --- ---
    +1
    Třímetrový teleskop infračervené observatoře NASA a Keckova observatoř (jsou vedle sebe na Mauna Kea) budou v pátek pozorovat zánik sondy Cassini.

    https://www.nasa.gov/feature/goddard/2017/ground-based-telescopes-support-cassini

    VIRGO
    VIRGO --- ---
    +1
    Časová linka událostí posledních dnů a hodin od Emily:

    What to expect during Cassini's final hours | The Planetary Society
    http://planetary.org/blogs/emily-lakdawalla/2017/0911-cassini-eom-timeline.html

    Článek o pondělním grav. manévru u Titanu:

    https://www.nasa.gov/feature/jpl/cassini-makes-its-goodbye-kiss-flyby-of-titan

    VIRGO
    VIRGO --- ---
    +2
    https://www.nasa.gov/image-feature/jpl/pia21780/juno-s-eighth-close-approach-to-jupiter

    This series of enhanced-color images shows Jupiter up close and personal, as NASA’s Juno spacecraft performed its eighth flyby of the gas giant planet.
    The images were obtained by JunoCam.

    From left to right, the sequence of images taken on Sept. 1, 2017 from 3:03 p.m. to 3:11 p.m. PDT (6:03 p.m. to 6:11 p.m. EDT). At the times the images
    were taken, the spacecraft ranged from 7,545 to 14,234 miles (12,143 to 22,908 kilometers) from the tops of the clouds of the planet at a latitude range
    of -28.5406 to -44.4912 degrees.

    VIRGO
    VIRGO --- ---
    +2
    https://www.nasa.gov/image-feature/jpl/pia21345/so-far-from-home

    With this view, Cassini captured one of its last looks at Saturn and its main rings from a distance. The Saturn system has been Cassini's home for 13 years,
    but that journey is nearing its end.

    Cassini has been orbiting Saturn for nearly a half of a Saturnian year but that journey is nearing its end. This extended stay has permitted observations of
    the long-term variability of the planet, moons, rings, and magnetosphere, observations not possible from short, fly-by style missions.

    Images taken on Oct. 28, 2016 with the wide angle camera using red, green and blue spectral filters were combined to create this color view. This view looks
    toward the sunlit side of the rings from about 25 degrees above the ringplane.

    The view was acquired at a distance of approximately 870,000 miles (1.4 million kilometers) from Saturn. Image scale is 50 miles (80 kilometers) per pixel.

    VIRGO
    VIRGO --- ---
    Large Binocular Telescope Snags First Glimpse of NASA’s OSIRIS-REx Spacecraft Since Launch
    https://www.nasa.gov/...ure/goddard/2017/large-binocular-telescope-snags-first-glimpse-of-osiris-rex

    This set of magnified, cropped images shows NASA’s OSIRIS-REx spacecraft (highlighted in red) as it approaches Earth for its Sept. 22 Earth Gravity Assist.
    To improve visibility, the images have been inverted so that black and white are reversed. The images were taken Sept. 2, by the Large Binocular Telescope
    Observatory located on Mount Graham in Arizona. This is the first Earth-based view of the spacecraft since its launch on Sept. 8, 2016.

    OSIRIS-REx, which was approximately 7 million miles (12 million kilometers) away when the images were taken, appears at approximately 25th magnitude.

    VIRGO
    VIRGO --- ---
    Cassini - Orbit 292

    Dnes kolem 21. h SELČ proletí Cassini ve vzdálenosti 119 049 km od měsíce Titan. Grav. manévr
    udělí sondě poslední "šťouchanec", který ji navede na kolizní dráhu se Saturnem (v pátek 15.9.)

    Cassini: The Grand Finale: Overview
    https://saturn.jpl.nasa.gov/mission/grand-finale/overview/

    VIRGO
    VIRGO --- ---
    Extreme Jetssu201732 | www.cfa.harvard.edu/
    https://www.cfa.harvard.edu/news/su201732

    A black hole X-ray binary (BHXB) is a black hole orbiting a normal star. When matter from the normal star accretes onto the black hole,
    a jet of charged particles is ejected at relativistic (near-light) speeds, and these particles emit strong X-ray radiation. The processes
    involved are thought to be similar to ones active under the more dramatic conditions in active galactic nuclei. Most known BHXBs are located
    in our galaxy, and being much closer to us they can be studied in more detail than their more distant cousins.

    VINCENT_BU
    VINCENT_BU --- ---
    +1
    KIC 8462852 Boyajian's Star Update 09/10/17
    https://www.youtube.com/watch?v=wu1qPf9rkpk
    VIRGO
    VIRGO --- ---
    +1
    https://www.nasa.gov/...ge-feature/goddard/2017/hubble-sees-newborn-stars-in-arms-of-a-spiral-galaxy

    NGC 5559 was discovered by astronomer William Herschel in 1785 and lies approximately 240 million light-years away in the northern constellation of Boötes (the herdsman)

    In 2001, a calcium-rich supernova called 2001co was observed in NGC 5559. Calcium-rich supernovae are described as “fast-and-faint,” as they're less luminous than other
    types of supernovae and also evolve more rapidly, to reveal spectra dominated by strong calcium lines. 2001co occurred within the disk of NGC 5559 near star-forming regions,
    but calcium-rich supernovae are often observed at large distances from the nearest galaxy, raising curious questions about their progenitors.

    VIRGO
    VIRGO --- ---
    +1
    New Canadian telescope will map largest volume of space ever surveyed
    https://news.ubc.ca/.../09/07/new-canadian-telescope-will-map-largest-volume-of-space-ever-surveyed/

    A Canadian effort to build one of the most innovative radio telescopes in the world will open the universe to a new dimension
    of scientific study. Hon. Kirsty Duncan, minister of science, today installed the final piece of this new radio telescope, which will
    act as a time machine allowing scientists to create a three-dimensional map of the universe extending deep into space and time.

    New CHIME radio telescope will help unravel today’s biggest cosmic mysteries
    https://www.youtube.com/watch?v=c-P9kbo0U8A
    VIRGO
    VIRGO --- ---
    +2
    Are we being watched? Tens of other worlds could spot the Earth
    http://www.ras.org.uk/...d-press/3042-are-we-being-watched-tens-of-other-worlds-could-spot-the-earth

    A group of scientists from Queen’s University Belfast and the Max Planck Institute for Solar System Research in Germany have turned exoplanet-hunting on its head,
    in a study that instead looks at how an alien observer might be able to detect Earth using our own methods. They find that at least nine exoplanets are ideally
    placed to observe transits of Earth, in a new work published in the journal Monthly Notices of the Royal Astronomical Society.

    VIRGO
    VIRGO --- ---
    +5
    https://www.nasa.gov/image-feature/jpl/pia21627/staggering-structure

    This view from NASA's Cassini spacecraft shows a wave structure in Saturn's rings known as the Janus 2:1 spiral density wave.
    Resulting from the same process that creates spiral galaxies, spiral density waves in Saturn’s rings are much more tightly wound.
    In this case, every second wave crest is actually the same spiral arm which has encircled the entire planet multiple times.

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