共查询到20条相似文献,搜索用时 15 毫秒
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Earth, Moon, and Planets - 相似文献
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John R. Percy 《Experimental Astronomy》1994,5(1-2):121-128
The role of amateurs and small-scale equipment in astronomical photometry is reviewed. The value of suitably selected projects for both research and educational purposes is stressed. Recent technical developments are noted, and a brief extrapolation to possible future arrangements included.Keynote address at the conference 相似文献
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D.G. King-Hele 《Planetary and Space Science》1975,23(3):557-559
New measurements have been made of the reduced polarization in a Fraunhofer line (Hβ) of blue sky light. The value of the depolarization agrees well with a previously reported intensity filling-in effect. There is no evidence of a change of the azimuth of vibration of the polarization across the line profile. 相似文献
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