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occulting disk


'occulting disk' can also refer to...

 

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A small disk placed centrally in the field of view of an eyepiece, or at the focal point of a telescope, to hide or occult a bright object so that fainter objects can be seen more readily. An occulting disk may be used, for example, to reveal faint satellites of a planet, or to hide the Sun's disk in a coronagraph.

Subjects: Astronomy and Astrophysics.


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