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  • Astrophysics
  • American Association for the Advancement of Science (AAAS)  (4)
  • 2015-2019  (4)
  • 1975-1979
  • 1945-1949
  • 2016  (4)
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  • 2015-2019  (4)
  • 1975-1979
  • 1945-1949
Year
  • 1
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    [In Depth] Titanic balloon sets record and tantalizes scientists (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-07-08
    Description: The largest pressurized balloon to be launched by NASA has set a record for endurance: the longest midlatitude flight by a large scientific balloon. For decades, conventional "zero-pressure" balloons have given researchers a high-altitude platform for studying atmospheric chemistry, the cosmic microwave background, and many other phenomena. But at temperate latitudes, the endurance of conventional balloons is limited. So-called superpressure balloons promise to bring that endurance to temperate latitudes, opening new phenomena to observation. Packing 532,000 cubic meters of helium and measuring 114 meters in diameter, NASA's latest superpressure balloon circled the Southern Hemisphere for 46 days, lofting a gamma ray telescope to the edges of space. Author: Patrick Monahan
    Keywords: Astrophysics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    [In Depth] LIGO detects another black hole crash (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-06-17
    Description: The biggest discovery in science this year—the observation of ripples in space-time called gravitational waves—was no fluke. For a second time, physicists working with the two massive detectors in the Laser Interferometer Gravitational-Wave Observatory (LIGO) have detected a pulse of such waves, the LIGO team reported on 15 June at a meeting of the American Astronomical Society in San Diego, California. Once again the waves emanated from the merger of two black holes, the ultraintense gravitational fields left behind when massive stars collapse into infinitesimal points. The new observation suggests that if LIGO's detectors reach their design sensitivity—which physicists hope to achieve by 2019—the observatory will spot dozens or even hundreds of the otherwise undetectable events each year, ushering in a new era of gravitational-wave astronomy. Author: Adrian Cho
    Keywords: Astrophysics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    [Book Review] Fear and loathing in the hunt for gravitational waves (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-04-15
    Description: On 14 September 2015, at 9:50:45 universal time, humans detected for the first time a gravitational wave—a rippling, infinitesimal stretching of spacetime itself set off when two black holes spiraled into each other. That mind-boggling discovery was made by the 1000 physicists working with the Laser Interferometer Gravitational-Wave Observatory (LIGO), a duo of enormous optical instruments in Livingston, Louisiana, and Hanford, Washington. Black Hole Blues provides a lively, if not wholly satisfying, account of the 40-year quest to build LIGO. Author: Adrian Cho
    Keywords: Astrophysics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    [Perspective] Detecting structure in a protostellar disk (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-09-30
    Description: It is now well accepted that stars form from clouds of gas and dust that collapse under their own gravity (1). However, if all the material fell directly onto the young protostar, it would spin up so much that it would ultimately tear itself apart. Instead, most of the material will initially form a thin, rotationally supported, protostellar disk. On page 1519 of this issue, Pérez et al. (2) present a high-resolution image of such a disk, using the Atacama Millimeter/submillimeter Array (ALMA). It is this disk that provides mechanisms for transporting angular momentum outward—allowing mass to accrete onto the central protostar—and is the site of planet formation (see the illustration). Author: Ken Rice
    Keywords: Astrophysics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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