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A solstice is the time when the Sun reaches its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around 20–22 June and 20–22 December.
The United States Naval Observatory states "the Equation of Time is the difference apparent solar time minus mean solar time", i.e. if the sun is ahead of the clock the sign is positive, and if the clock is ahead of the sun the sign is negative. [6] [7] The equation of time is shown in the upper graph above for a period of slightly more than a ...
The sunrise equation or sunset equation can be used to derive the time of sunrise ... C is the Equation of the center value needed to calculate ... For example, for ...
Arriving on the same day across the globe, a solstice occurs when the sun reaches its lowest or highest point in the sky during the year as a result of the Earth’s axis tilting to or away from ...
The time when the Sun transits the observer's meridian depends on the geographic longitude. To find the Sun's position for a given location at a given time, one may therefore proceed in three steps as follows: [1] [2] calculate the Sun's position in the ecliptic coordinate system, convert to the equatorial coordinate system, and
Your local time zone in relation to UTC determines the time and even the date that the solstice happens for you. For instance, that’s 1:51 p.m. in Los Angeles, 4:51 p.m. in New York City, 9:51 p ...
The June solstice is the solstice on Earth that occurs annually between 20 and 22 June according to the Gregorian calendar. In the Northern Hemisphere , the June solstice is the summer solstice (the day with the longest period of daylight), while in the Southern Hemisphere it is the winter solstice (the day with the shortest period of daylight).
The summer solstice occurs for Earth’s upper half when the Northern Hemisphere is tilted most closely toward the sun. This also marks the longest day and shortest night of the year. Around the same time, the Southern Hemisphere is at its most extreme tilt away from the sun, entering winter solstice and its shortest day of the year.