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Observers within about 48°34' of the Equator can view twilight twice each day on every date of the year between astronomical dawn, nautical dawn, or civil dawn, and sunrise as well as between sunset and civil dusk, nautical dusk, or astronomical dusk. This also occurs for most observers at higher latitudes on many dates throughout the year ...
The time of dusk is the moment at the very end of astronomical twilight, just before the minimum brightness of the night sky sets in, or may be thought of as the darkest part of evening twilight. [4] However, technically, the three stages of dusk are as follows: At civil dusk, the center of the Sun's disc goes 6° below the horizon in the ...
The opposite phenomenon, polar day or midnight sun, occurs when the Sun remains above the horizon for more than 24 hours. There are multiple ways to define twilight, the gradual transition to and from darkness when the Sun is below the horizon. [2] "Civil" twilight occurs when the Sun is between 0 and 6 degrees below the horizon.
The terminator passes through any point on Earth's surface twice a day, at sunrise and at sunset, apart from polar regions where this only occurs when the point is not experiencing midnight sun or polar night. The circle separates the portion of Earth experiencing daylight from that experiencing darkness (night).
The 63rd parallel north is a circle of latitude that is 63 degrees north of the Earth's equatorial plane.It crosses the Atlantic Ocean, Europe, Asia and North America.. At this latitude the sun is visible for 20 hours, 19 minutes during the summer solstice and 4 hours, 43 minutes during the winter solstice.
World map showing the areas of Earth receiving daylight around 13:00 UTC in April. Daylight is the combination of all direct and indirect sunlight during the daytime.This includes direct sunlight, diffuse sky radiation, and (often) both of these reflected by Earth and terrestrial objects, like landforms and buildings.
Sun path, sometimes also called day arc, refers to the daily (sunrise to sunset) and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates and orbits the Sun. The Sun's path affects the length of daytime experienced and amount of daylight received along a certain latitude during a given season.
The time of dawn is also referred to as the brahmamuhurta (Brahma is the god of creation and muhurta is a Hindu time of the day), and is considered an ideal time to perform spiritual activities, including meditation and yoga. In some parts of India, both Usha and Pratyusha (dusk) are worshipped along with the Sun during the festival of Chhath.