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occult
(redirected from Occultations)

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The secondary is thought to be locked in synchronous rotation about the primary (rather like the Earth-Moon system) and occasionally undergoes mutual eclipses and occultations.
One way of studying Pluto's atmosphere from Earth is by means of stellar occultations.
By measuring how much sunlight is absorbed by the atmosphere during the occultations, the spectrometer could detect the concentration of gases in the atmosphere to a sensitivity of several parts per trillion.
 
 
 
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