Calculations of sunrise and sunset in Los Angeles – California – USA for October 2021. Generic astronomy calculator to calculate times for sunrise, sunset, moonrise, moonset for many cities, with daylight saving time and time zones taken in account.
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The sunrise and sunset is calculated based on a smooth Earth (no mountains). The measurement of sunrise is taken the moment the top of the sun breaks the horizon while the measurement of sunset is taken the moment the top of the sun dips below the horizon.What determines sunrise and sunset times?
Basically, sunrise and sunset are based on when the upper edge of the sun`s disc appears to touch the horizon. ''Appears'' is used because the sun`s rays are bent, or refracted, slightly by the Earth`s atmosphere. For precision`s sake, the times are calculated as the moments when the geocentrical center...What do you mean by Sunrise and Sunset?
Answer: Sunset occurs when the upper edge of the Sun - called the upper limb - sinks just under the horizon; sunrise occurs when the upper limb rises just above the horizon. The same is true for the Moon . These events can happen earlier or later than expected because the atmosphere bends the light rays near the horizon in such a manner that the Sun and Moon can appear to be above the horizon when they are already (or still, in the case of sunrise and moonrise) beneath it.What is the period from one sunrise to sunset called?
The period of daytime from the standpoint of a surface observer is roughly defined as the period between sunrise, when the Earth's rotation towards the east first causes the Sun's disc to appear above the horizon, to sunset, when the continuing rotation of the Earth causes the Sun's disc to disappear below the horizon to the west.
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