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transit circle |
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transit circle [′trans·ət ‚sər·kəl] (engineering) A type of astronomical transit instrument having a micrometer eyepiece that has an extra pair of moving wires perpendicular to the vertical set to measure the zenith distance or declination of the celestial object in conjunction with readings taken from a large, accurately calibrated circle attached to the horizontal axis. Also known as meridian circle; meridian transit. 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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| Planners have long said that ``Phase Two'' - as the Gold Line extension is often called by those in transit circles - would begin service in 2008. |
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