التفاصيل البيبلوغرافية
| العنوان: |
75, 50 & 25 YEARS AGO. |
| المؤلفون: |
Sinnott, Roger W. (AUTHOR) |
| المصدر: |
Sky & Telescope. Apr2021, Vol. 141 Issue 4, p7-7. 5/9p. 3 Color Photographs. |
| مصطلحات موضوعية: |
*RADIO wave propagation, *BROWN dwarf stars, *HIGH frequency antennas |
| مستخلص: |
Project Diana "Following the announcement on January 25, 1946, that the Signal Corps experiments were successful in making contact with the moon by radar, the imaginations of news reporters and feature story writers went wild with predictions that space ships would soon be a reality. One surprising outcome of such a study is the recent discovery by Charles Cowley and myself of the existence of the short-lived unstable element promethium in the atmosphere of the peculiar A-type star HR 465…. April 1996 Brown Dwarfs "The year 1995 will likely be remembered by astronomers for the culmination of a 20-year hunt: the search for the substellar objects known as brown dwarfs…. [Extracted from the article] |
| قاعدة البيانات: |
Academic Search Index |
