By occultation is meant, as is well known, the eclipse of the body through passing into the shadow of its parent planet.
On this evening there was to be an occultation of a star at the moon's dark limb.
Varying characteristics may be procured by means of such a contrivance—single, double, triple or other systems of occultation.
The disappearance of a star by the interposition of the moon is called an "occultation."
Gil Blas himself goes through a long period of occultation, and the whole rather drags.
The phenomenon illustrated is called the "occultation" of the planet.
We see that there is another aspect to the occultation of Orion, and a very ominous one.
An occultation of Mercury by Venus was observed with a telescope on May 17, 1737.
During the period of his occultation I took tea, and read or wrote without interruption.
The night was mild, with a very clear sky; and I obtained a very excellent observation of an occultation of Tau.
early 15c., "disguise or concealment of identity," from Latin occultationem (nominative occultatio), noun of action from past participle stem of occultare "to hide, conceal," frequentative of occulere (see occult).
The passage of one celestial object in front of another, temporarily blocking the more distant object from view. Occultations can provide information about the existence and measurements of the obscuring object. For example, when an asteroid passes in front of a star, the star is temporarily obscured to an observer on Earth, thus revealing the presence and approximate size of the asteroid. In 1977, astronomers were able to identify the rings around the planet Uranus when the otherwise invisible rings were observed to occult a background star. Occultations have also led to the discovery of more distant objects in space, such as binary stars and extrasolar planets. Compare transit.