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occultation

occultation

1 9.9
One object in the sky, like a moon, passes in front of another and hides it completely or partly
  • noun
  • /ˌɑːkʌlˈteɪʃən/
  • Specialized
translation icon : ocultación
  • During the occultation, the moon completely obscured the bright star, making it invisible to viewers.
  • occultation timing
  • grazing occultation
  • occultation of stars

Examples

  • The second planetary ring system was discovered during a star occultation by Uranus in 1977.

    Academic text (1995)
  • Such an event is called an occultation, a purely scientific term derived from the Latin word "to cover."

    Academic text (1993)
  • Now they detected the occultation showing where the asteroid itself passed in front of that background star and blocked the light for five seconds.

  • During a grazing occultation, the star seems to move along a line tangent to the lunar disk.

    Academic text (1993)
  • Amateur astronomers can make serious contributions to astronomical research with accurate occultation timings.

    Academic text (1993)
  • Accurate timing of lunar occultations can help astronomers get better maps of the mountains and valleys on the edges of the Moon.

    Academic text (1993)
  • Astronomers eagerly awaited the occultation of Venus by the moon, which would create a stunning celestial event.

  • The occultation event lasted several minutes, allowing scientists to collect valuable data about the celestial bodies.

Antonyms

88 3.9

Making a secret or hidden thing known to people

54 2.8

How easy it is to see things, for example in fog

How Obscuring

total eclipse
  • Specialized
3 4.4
eclipse
  • Specialized
87 5.2
occultation
  • Specialized
1 9.9
to transit
  • Specialized
1 9.9

Surface Forms

occultation singular
occultations plural

Morphology

occultation = occult (semi-transparent) = occult + ation

Formally derived from 'occult' + '-ation' in a regular way, but the astronomical sense is specialized and learners who know 'occult' only as 'supernatural' may be misled.

Etymology

The word occultation comes from the Latin root occult-, which means 'hidden' and is the same root as the word occult. So an occultation is when one object passes in front of another and 'hides' it from view.