Light year

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Gregorian year Gregorian year - A system of time calculation, which is based on the Earth's rotation around the sun. Gregorian year		Julian year The Julian year - 1 Julian year is 365.25 Julian days for 86,400 seconds, that is exactly 31,557,600 seconds. Julian year
Anomalistic year Anomalistic year - It is the Earth's orbital period relative to the points of its elliptical orbit, called apses - this is the time where the Earth is closest to the Sun , and apocentre where Earth is farthest from the Sun . Anomalistic year		Syderic year Time conversion tables, all time measurement units Syderic year
Tropic year Tropical year Still known as the solar year - a period of time during which the sun completes one cycle of changing seasons, as can be seen from the Earth, such as the time from one vernal equinox to the next, or from one of the summer solstice to another. Tropic year		Dracontic year Draconic year - This is the time interval between two successive passages of the Sun through the same node of the lunar orbit. Dracontic year
Hectare Hectare Hectares; ha - it is off-system unit area measurement equal to a square area with a side of 100 m. Hectare		Are (hundredth) Ar as well, are from Latin. Are (hundredth)