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nightside

nightside

1 8.2
The side of a planet or moon that is dark because the sun does not shine there
  • noun
  • /ˈnaɪtsaɪd/
  • Specialized
translation icon : lado nocturno
  • The sun broke over the edge of Earth, bringing with it a slender blue-white sickle of dawn that encroached on the expanse of darkness that was the planet's nightside as seen from low orbit.
  • the nightside of a planet

Examples

  • The astronomers focused their observations on the planet's nightside, where temperatures could be measured in total darkness.

  • Polaris slipped toward the nightside slowly.

    Fiction book (1990)
  • Internal processes within the magnetospheric tail cause aurorae on the nightside of the Earth, resulting from energy being deposited about 100-200 km up in the form of energetic electrons.

    Blog text (28)
  • The sun broke over the edge of Earth, bringing with it a slender blue-white sickle of dawn that encroached on the expanse of darkness that was the planet's nightside as seen from low.

    Blog text (32)
  • The excitation on the dayside is caused by solar UV and X-ray; on the nightside, by the aurorae and precipitating particles from the tail in general.

    Blog text (28)
  • The nightside of the moon remains completely devoid of sunlight, allowing for a cooler temperature than its sunlit surface.

  • During their study, the scientists discovered unique geological formations only visible on the nightside of the planet.

Antonyms

dayside
  • Specialized
1 7.7

The side of a planet or moon that faces the sun and is in sunlight

How Bright

dayside
  • Specialized
7.4
twilight zone
  • Informal
7.7
nightside
  • Specialized
1 8.2

Surface Forms

nightside singular
nightsides plural

Morphology

nightside = night + side (transparent) = night + side

A straightforward compound meaning the side that is in darkness; learners can directly derive the meaning from 'night' + 'side'.

Etymology

The word nightside comes from night ('the dark time') and side ('part'), so it literally means the part of a planet or place that is not lit by the sun. That is why people talk about the Earth's nightside when they mean the dark side you see from space.