An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian
فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک
M. Heydari-Malayeri - Paris Observatory
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Number of Results: 82 Search : number
Wolf number adad-e Wolf Fr.: nombre de Wolf A number indicating the degree of → sunspot → activity. Same as → sunspot number and → relative sunspot number. Named after Johann Rudolf Wolf of Zurich who introduced the number in 1852; → number. |
Z-number adad-e atomi (#) Fr.: nombre atomique Same as → atomic number. Z, from the German word Zahl "number, numeral, figure," which was used to specify an element's numerical place in the → periodic table; → number. |
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