使入伍
发表于 2025-3-21 17:42:38
书目名称Double Stars影响因子(影响力)<br> http://figure.impactfactor.cn/if/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars影响因子(影响力)学科排名<br> http://figure.impactfactor.cn/ifr/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars网络公开度<br> http://figure.impactfactor.cn/at/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars网络公开度学科排名<br> http://figure.impactfactor.cn/atr/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars被引频次<br> http://figure.impactfactor.cn/tc/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars被引频次学科排名<br> http://figure.impactfactor.cn/tcr/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars年度引用<br> http://figure.impactfactor.cn/ii/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars年度引用学科排名<br> http://figure.impactfactor.cn/iir/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars读者反馈<br> http://figure.impactfactor.cn/5y/?ISSN=BK0282690<br><br> <br><br>书目名称Double Stars读者反馈学科排名<br> http://figure.impactfactor.cn/5yr/?ISSN=BK0282690<br><br> <br><br>
烦忧
发表于 2025-3-21 23:05:51
19th-Century Achievements,raced. Most visual binaries have not completed a revolution since discovery, and therefore, have not been reobserved in the same section of the orbit. To the present-day orbit investigator, 150 yr old measurements still have far more interest than a mere historical, and so the yellowed folio pages o
ELUC
发表于 2025-3-22 01:44:51
Three Quarters of This Century,blem, first extragalactic studies with the new Mt. Wilson telescope, the laws of stellar interiors, and the impact of relativity theory upon astronomy — these and other early highlights of 20th-century work are so much connected with the present, that the historical outline can be said here to merge
从属
发表于 2025-3-22 04:40:34
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Irksome
发表于 2025-3-22 09:42:06
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Common-Migraine
发表于 2025-3-22 13:09:58
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Common-Migraine
发表于 2025-3-22 20:40:49
Interferometric Observation, with the ‘maximum’ visibility of the fringes as given by a monochromatic point source, a double star does not differ if the line joining the stars is perpendicular to that joining the interferometer slits. Minimum visibility occurs when the separation . of the pair (in radians) and the component .
colostrum
发表于 2025-3-23 00:10:59
Photographic Positions,rtzsprung (1921). Though the mean error of one measured image is of the order of 0"1 in each coordinate, one plate can accomodate many exposures obtainable in a short time, and an internal plate error of only 0"02 to 0"01 can be reached from 25 to 100 images. The actual errors are somewhat larger, o
Petechiae
发表于 2025-3-23 02:09:55
The Orbital Elements of a Visual Binary,as is obtained from the relative observations. In the two-body problem with the masses . and ., the radius vector r, and the constant of gravitation ., the relative motion is represented by the second-order differential equation .. Its six scalar constants of integration correspond to six elements w
Needlework
发表于 2025-3-23 08:24:37
Dtermination of Visual Binary Orbits,stem, yet in practice there is little resemblance between the methods. The motion of the earth is insignificant (or easily allowed for in the spectroscopic and photometric cases) which greatly simplifies the formalism. On the other hand, the measuring errors are much larger, compared with the quanti