cosmic time

Definitions of cosmic time
1

n the time covered by the physical formation and development of the universe

Types:
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sidereal time
measured by the diurnal motion of stars
solstice
either of the two times of the year when the sun is at its greatest distance from the celestial equator
equinox
either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length
day, sidereal day
the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
sidereal year
the time for the earth to make one complete revolution around the sun, relative to the fixed stars
sidereal hour
1/24 of a sidereal day
sidereal month
period between successive conjunctions with a star, 27.322 days
June 21, midsummer, summer solstice
June 21, when the sun is at its northernmost point
winter solstice
December 22, when the sun is at its southernmost point
March equinox, spring equinox, vernal equinox
March 21
September equinox, autumnal equinox, fall equinox
September 22
Type of:
time
the continuum of experience in which events pass from the future through the present to the past

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