Stability of Neptune's ring arcs in question
Article Abstract:
Neptune exhibits ring arcs which are stable clumps of dust discontinuous from each other. A mechanism for confining the dust to these arcs proposes orbital resonances with two shepherding satellites. Another proposes a single satellite producing the ring arc structures. Observations of the ring arcs and Galatea, reveal a mismatch between the sites of the arcs and the site of Galatea's co-rotation inclined resonance.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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The accelerations of stars orbiting the Milky Way's central black hole
Article Abstract:
Research is presented concerning the velocity of the stars orbiting around the center of the Milky Way. The use of the orbiting stars to determine the size of the black hole at the center of the Milky Way is discussed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Black holes to extragalactic
Article Abstract:
The performance analysis of a newly developed X-ray binary system, M 33 X-7 which was used to measure the mass of a black hole (Triangulum or M 33) lying far beyond our own Galaxy is reported.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
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