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Obscuration in a Sentence
  • They are made of bluish, "smoked," or almost black coloured glass, and are of very various shapes, according to the amount of obscuration necessary.
  • About 56 Algol variables were known in 1907; the variables of this class are the most difficult to detect, for the short period of obscuration may easily escape notice unless the star is watched continuously.
  • The areas of the sky which contain heavy obscuration usually exhibit clouds of several degrees of opacity.
  • The optical data allows a study of the dust obscuration.
  • C. Vogel's spectroscopic measures in 1889.2 Previously to each obscuration, the star was found to be moving rapidly away from the earth; its velocity then diminished to zero pari passu with the loss of light, and reversed its direction during the process of recovery.
  • Russell' with a partial obscuration visible in northern China 2136 B.C. The date cannot be far wrong, and it is by far the earliest assignable to an event of the kind.
  • The calibration unit produces a beam that matches the telescope pupil very nicely except that it contains no central obscuration.
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