منابع مشابه
Rendering lunar eclipses
Johannes Kepler first attributed the visibility of lunar eclipses to refraction in the Earth’s atmosphere in his Astronomiae Pars Optica in 1604. We describe a method for rendering images of lunar eclipses including color contributions due to refraction, dispersion, and scattering in the Earth’s atmosphere. We present an efficient model of refraction and scattering in the atmosphere, including ...
متن کاملA review of past eclipses
EE Cep is an eclipsing binary with a period of 5.6 years. The next eclipse will occur soon, in May–June 2003, and all available past eclipses were collected and briefly analysed. EE Cep shows very large changes of the shape and the depth of minima during different eclipses, however it is possible to single out some persistent features. The analysis suggests that the eclipsing body should be a l...
متن کاملTiming Records of Ancient Lunar Eclipses in China and Long-term Variation of the Earth's Spin Speed
The Chinese ancient accounts of timing observations of 48 lunar eclipses and the secular variation of the Earth's spin speed are discussed. A series of T expressing the secular deceleration of the Earth's rotation was obtained. The average increase rate of length of the day is about 1.5 milliseconds per century.
متن کاملPredicting CAP-related mortality with CRB-65.
Predicting CAP-related mortality with CRB-65 Ewig et al are to be commended for their very large study of 388 406 patients admitted with community-acquired pneumonia (CAP) in German hospitals from 2005 to 2006. Using the CRB-65 tool (confusion, respiratory rate $30 min, low blood pressure (either systolic <90 mm Hg or diastolic #60 mm Hg) and age $65 years), the authors found 30-day mortality r...
متن کاملTHE EXTENDED LAW OF CORRESPONDING - STATES AND THE INTERMOLECULAR POTENTIALS FOR Ar-Ar, Ar-Kr AND Kr-Kr
An inversion procedure is used to obtain from the extended principle of corresponding - states the pair interaction potentials for argon, krypton and its mixture over a tetnperature range from absolute zero to the onset of ionization. The experimentally-reduced viscosity collision integrals obtained from the corresponding - states correlation have been inverted directly to give the reduced...
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ژورنال
عنوان ژورنال: Information Bulletin on Variable Stars
سال: 2018
ISSN: 0374-0676
DOI: 10.22444/ibvs.6235