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superluminal motion |
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superluminal motion [‚sü·pər‚lim·ə·nəl ′mō·shən] (astronomy) Apparent proper motion exceeding the velocity of light in an astronomical object. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Astronomers had previously observed superluminal motion of material expelled by GRS 1915+105, notably during a giant outburst 3 years ago (SN: 9/3/94, p. Last June, at a meeting of the American Astronomical Society in Minneapolis, he and his colleagues reported their recent observations of superluminal motion in a jet of gas at the center of the galaxy M87. The appearance of superluminal motion is held to be an optical illusion, but the illusion imposes serious difficulties on attempts at an explanation. |
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