阴郁
发表于 2025-3-26 22:10:44
Observation of the Planets,931), R. M. ., Mc. in English speaking countries; . (1745–1816), . (1867–1941), . in German regions; and . (1892–1955) in France will always remain closely interwoven with the history of planetary research. In spite of this, however, in view of the great optical achievements and the multitude of obs
congenial
发表于 2025-3-27 04:28:35
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荒唐
发表于 2025-3-27 05:20:10
Noctilucent Clouds, Aurorae, Zodiacal Light,here—noctilucent clouds, luminous bands, and aurorae—and partly in interplanetary space—the Zodiacal Light. Actually, the study of these phenomena belongs to a large extent in the field of geophysics rather than astronomy, but usually the observing astronomer includes them in his nighttime work beca
一起
发表于 2025-3-27 09:49:30
The Photometry of Stars and Planets,ts affecting our senses can be based on scales and measuring methods that are independent of our sensations. Thus, light intensity is measured by chemical effects on a photographic plate, or by the electric current from a photocell. If, on the other hand, our light sensations themselves are used to
善变
发表于 2025-3-27 16:43:59
Optical Radiation Receivers, as electromagnetic radiation in the form of radio waves. The one feature common to all these radiations is the fact that they are electromagnetic waves propagated with the velocity of light. Their wavelength, intensity, and composition, on the other hand, are very different.
Grandstand
发表于 2025-3-27 19:35:49
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definition
发表于 2025-3-28 01:04:27
Artificial Earth Satellites,ch and fruitful field in this work and very soon united in organized cooperation. They have contributed with their modest means very useful results, and in compensation have received joy, stimulation, and enrichment of their knowledge. Thus in a modern handbook for amateur astronomers a special chap
STING
发表于 2025-3-28 02:49:49
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Indelible
发表于 2025-3-28 09:50:55
Book 19751st edition book is addressed to lecturers, teachers, students and pupils. It wishes to serve them as a guide to "astronomical experiments", which we suggest should be performed in primary and secondary schools, specialist colleges, and extramural courses.
ostrish
发表于 2025-3-28 11:10:28
nomers the book is addressed to lecturers, teachers, students and pupils. It wishes to serve them as a guide to "astronomical experiments", which we suggest should be performed in primary and secondary schools, specialist colleges, and extramural courses.978-3-642-48284-7978-3-642-48282-3