 | 1814 - 378 páginas
...will take place in every year, and the true situations of the sun and moon, in each of their orbits at those times ; and if from this it appears that the two luminaries are within the proper lim- ' its of the node, there will be an eclipse ; otherwise, none will be occasioned, for reasons... | |
 | John Bonnycastle - 1816 - 490 páginas
...happen. For as an eclipse can only take place at the time of a new or full moon, the chief requisites are to determine the number of mean conjunctions and oppositions...are within the proper limits of the node, there will be an eclipse, or otherwise not, agreeably to what has been already observed upon this subject. But... | |
 | Thomas Arnold - 1822 - 1008 páginas
...For, as an eclipse can only take place at the time of a new or full moon, the chief requisites are to determine the number of mean conjunctions and oppositions...the sun and moon in their orbits at each of those tirm-s. And, if from this it appears that the two luminaries are within the proper limits of the node,... | |
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... not be difficult to conceive how astronomers are able to foretel the exact time when any phenomenon of this kind will happen. For as an eclipse can only take place at the time of a new or full moon, the chief requisites are to determine the number... 