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Encyclopedia

From Wikipedia, the free encyclopedia

Diurnal ("daily") may refer to:

In astrology:

  • Diurnal chart, a chart for a given date, based on the natal chart
  • Diurnal planet, a planet in a sect for which the Sun is above the horizon
  • Diurnal sign, a sign in the zodiac
  • Diurnal arc, time expressed as right ascension

Simple English

Animals that are active during the day are called diurnal. They hunt or feed during the day and sleep during the night. Nocturnal animals do it the other way round.

Scientists sometimes use the word crepuscular to describe nocturnal animals that are not active when it is very dark at night; they are mostly active near dawn, dusk, and sometimes when the moon makes a lot of light.


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