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ingress

ingress

9.9
When a star or planet moves behind another object at the start of an eclipse
  • noun
  • /ˈɪnɡrɛs/
  • Specialized
translation icon : ingreso
  • As the celestial body approached, everyone in the planetarium noted the exact moment of its ingress behind the clouds.

Examples

  • Astronomers eagerly anticipated the ingress of the moon as it moved behind the Earth during the eclipse.

  • A noted clockmaker, Rittenhouse built a piece to measure the time of Venus's first and second contact (or ingress and egress) on the solar disc.

    Academic text (2004)

  • During the observatory event, the team carefully recorded the ingress of the planet passing across the star's face.

Synonyms

immersion
vsingress
  • Specialized
9.3

When a star or moon disappears into the shadow of another body

is the disappearance that occurs at the start of an eclipse or occultation

Antonyms

egress
  • Specialized
9.9

The moment a moon or planet appears again after being hidden during an eclipse

Surface Forms

ingress singular
ingresses plural

Morphology

ingress = in + gress

Although morphologically analyzable as 'in-' + 'gress', this is a specialized astronomical usage (technical jargon) unlikely to be deduced by an average B1 learner from the components.

Etymology

Ingress comes from in- 'into' and gress 'step', so imagine a star 'stepping into' another object's shadow. That's why in astronomy an ingress is the moment a body begins to enter behind something, like the start of an eclipse.