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From:Science (Vol. 263, Issue 5143) Peer-ReviewedScientific knowledge about the universe is being greatly enhanced by the use of astronomical instruments that examine various parts of the electromagnetic spectrum. Ultraviolet, x-ray and gamma ray observations have...
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From:Science (Vol. 300, Issue 5620) Peer-ReviewedImages of the molecular CO 2-1 line emission and the radio continuum emission from the redshift 4.12 gravitationally lensed quasi-stellar object (QSO) PSS J2322+1944 reveal an Einstein ring with a diameter of 1.5"....
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From:Nature (Vol. 503, Issue 7477) Peer-ReviewedThere are two proposed explanations for ultraluminous X-ray sources (1,2) (ULXs) with luminosities in excess of [10.sup.39] erg [s.sup.-1] They could be intermediate-mass black holes (more than 100-1,000 solar masses,...
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From:Science (Vol. 291, Issue 5501) Peer-ReviewedWhile theorists try to bring them under one explanatory umbrella, the cosmic rarities known as SGRs and AXPs seem to insist on their differences To high-energy astrophysicists, the calm beauty of the night sky is the...
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From:Science (Vol. 255, Issue 5044) Peer-ReviewedAre Globular Clusters Born In Galactic Collisions? The oldest stars, nearly as old as the universe itself, are collected in clumps that adorn galaxies like antique diamonds. Like ancient jewelry whose origin has...
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From:Science (Vol. 227) Peer-ReviewedMating Dance of the Two-Tailed Radio Source There is nothing particularly new anymore about finding galaxies with compact, hyperactive nuclei, nor is there anything unusual about those nuclei beaming back-to-back jets...
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From:Science (Vol. 258, Issue 5082) Peer-ReviewedJapanese astronomy was internationalized between 1972 and 1992 due to the growth of radio and x-ray astronomy. Noteworthy projects include the Ginga satellite, Astro-D, the Yohkoh mission and a space radio interferometry...
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From:Aleph: Historical Studies in Science & Judaism (Vol. 5) Peer-ReviewedMedieval Jewish scholars devoted a great deal of attention to positional astronomy and produced many sets of tables for finding the positions of planets, and the times and magnitudes of solar and lunar eclipses. (1) A...
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From:The Sciences (Vol. 39, Issue 4) Peer-ReviewedCYBERSPACE Making Contact--The long-awaited SETI@home project finally blasted off into cyberspace from its launchpad at the University of California, Berkeley, on May 17. Conceived as a screen saver that can run on...
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From:Science (Vol. 241, Issue 4874) Peer-ReviewedSoft X-ray Images of the Solar Corona with a Normal-Incidence Cassegrain Multilayer Telescope THE STUDY OF THE SOLAR ATMOSPHERE IS COMPLICATED IN that the sizes of the fundamental structures that control the important...
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From:Bulletin of the South Carolina Academy of ScienceObservational astronomy classes at the College of Charleston are becoming more and more hampered by light pollution, both from the campus and the surrounding metropolitan area. In this paper we report on a quantitative...
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From:Science (Vol. 284, Issue 5414) Peer-ReviewedBlack holes have seemed to come in only two varieties: "supermassive" ones, which power brilliant galaxies called quasars and weigh millions to billions of times more than the sun, and "stellar mass" black holes, which...
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From:Nature (Vol. 514, Issue 7521) Peer-ReviewedThe nature of ultraluminous X-ray astronomical sources has long been unclear. The latest observations of these rare systems provide some crucial clues, but still leave theorists scratching their heads. In the late...
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From:Science (Vol. 299, Issue 5605) Peer-ReviewedThe physical nature of uitraluminous x-ray sources is uncertain. Stellar-mass black holes with beamed radiation and intermediate black holes with isotropic radiation are two plausible explanations. We discovered radio...
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From:Journal of the British Astronomical Association (Vol. 121, Issue 2) Peer-ReviewedThe 2010 BAA Presidential Address, given on 2010 October 27 at the Royal Astronomical Society Lecture Theatre, Burlington House, Piccadilly, London W1. The past I am starting my story of collaboration between...
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From:Physics Essays (Vol. 22, Issue 4) Peer-ReviewedIt is shown how the outgoing radial motion of test particles in Schwarzschild-de Sitter spacetime resembles Hubble recession, so much that a cosmological paradigm is suggested in which the "big bang" was the emergence...
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From:Science (Vol. 293, Issue 5529) Peer-ReviewedA solar system is dying, and in its last gasps astronomers 5 light-years away can see signs that a billion comets are blazing into oblivion at once. The discovery of huge amounts of water streaming away from an aging,...
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From:Science (Vol. 290, Issue 5489) Peer-ReviewedSpill a clear drink on this page, and the drops of liquid will magnify the letters into a jumble of swelling arcs and dots. Astrophysicists think an analogous effect deep in space has helped them glimpse a much...
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From:Nature (Vol. 490, Issue 7418) Peer-ReviewedHundreds of stellar-mass black holes probably form in a typical globular star cluster, with all but one predicted to be ejected through dynamical interactions (1-3). Some observational support for this idea is provided...
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From:Nature (Vol. 460, Issue 7251) Peer-ReviewedUltraluminous X-ray sources are extragalactic objects located outside the nucleus of the host galaxy with bolometric luminosities (1) exceeding [10.sup.39] erg [s.sup.-1]. These extreme luminosities--if the emission is...