| 单词 | barnard's star |
| 释义 | Barnard's star[ bahr-nerdz ] / ˈbɑr nərdz / nouna red dwarf star of magnitude 9.5 in the constellation Ophiuchus, having the largest known proper motion and being the nearest star to earth (5.9 light-years) beyond the Alpha Centauri system. Origin of Barnard's starafter Edward E. Barnard (1857–1923), American astronomer, its discoverer Words nearby Barnard's starBarnaby, barnacle, barnacle goose, Barnard, Barnardo, Barnard's star, Barnaul, Barnave, barnboard, barnburner, barn dance Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for Barnard's starBarnard's star nouna red dwarf star in the constellation Ophiuchus having the largest proper motion known Word Origin for Barnard's starC20: named after Edward Emerson barnard Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for Barnard's starBarnard's star [ bär′nərdz ] A dim, main-sequence red dwarf in the constellation Ophiuchus that is the second nearest star to Earth after the Alpha-Centauri system. Although it is only 5.98 light-years from our solar system, it is too faint to be seen with the unaided eye. Barnard's star has a greater proper motion (movement with respect to the background stars that is caused by an object's own motion rather than by how it is viewed from Earth) than any other star. Barnard's star is named for its identifier, American astronomer Edward Emerson Barnard (1857-1923). The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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