![]() ![]() Likewise, the earliest sunset does not occur on the winter solstice, but rather about two weeks earlier, again depending on the viewer's latitude. This date depends on the viewer's latitude (connected with the Earth's slower movement around the aphelion around July 4). In the Northern Hemisphere, the latest sunset occurs late in June or in early July, but not on the summer solstice of June 21. During winter and spring, the days get longer and sunsets occur later every day until the day of the latest sunset, which occurs after the summer solstice. Small daily changes and noticeable semi-annual changes in the timing of sunsets are driven by the axial tilt of the Earth, daily rotation of the Earth, the planet's movement in its annual elliptical orbit around the Sun, and the Earth and Moon's paired revolutions around each other. The time of sunset varies throughout the year, and is determined by the viewer's position on Earth, specified by latitude and longitude, altitude, and time zone. ![]() Locations further north than the Arctic Circle and further south than the Antarctic Circle experience no full sunset or sunrise on at least one day of the year, when the polar day or the polar night persists continuously for 24 hours. Finally, night occurs when the Sun reaches 18 degrees below the horizon and no longer illuminates the sky. Dusk is at the very end of astronomical twilight, and is the darkest moment of twilight just before night. The third phase is astronomical twilight, which is the period when the Sun is between 12 and 18 degrees below the horizon. The second phase is nautical twilight, between 6 and 12 degrees below the horizon. The first one is civil twilight, which begins once the Sun has disappeared below the horizon, and continues until it descends to 6 degrees below the horizon. Sunset is distinct from twilight, which is divided into three stages. Near the horizon, atmospheric refraction causes sunlight rays to be distorted to such an extent that geometrically the solar disk is already about one diameter below the horizon when a sunset is observed. The time of sunset is defined in astronomy as the moment when the upper limb of the Sun disappears below the horizon. As viewed from the Northern Hemisphere, the Sun sets to the northwest (or not at all) in the spring and summer, and to the southwest in the autumn and winter these seasons are reversed for the Southern Hemisphere. As viewed from everywhere on Earth (except the North and South poles), the equinox Sun sets due west at the moment of both the spring and autumn equinoxes. Sunset, also known as sundown, is the daily disappearance of the Sun below the horizon due to Earth's rotation. One instance of this is the 2018 first person shooter Dusk (video game) by New Blood Interactive whose setting is in a similar lighting as the actual time of day.Sunset over the Delaware Bay at Sunset Beach, New Jersey, U.S., seen through cirrus clouds ĭusk can be used to create an ominous tone and has been used as a title for many projects. After this time the Sun no longer illuminates the sky, and thus no longer interferes with astronomical observations. It marks the end of astronomical twilight, which begins at nautical dusk. At astronomical dusk, the Sun's position is 18° below the horizon in the evening.At this time, objects are less distinguishable, and stars and planets appear to brighten. It marks the end of nautical twilight, which begins at civil dusk. At nautical dusk, the Sun apparently moves to 12° below the horizon in the evening.Beyond this point artificial light may be needed to carry out outdoor activities, depending on atmospheric conditions and location. The sky has many colors at this time, such as orange and red. At this time objects are still distinguishable and depending on weather conditions some stars and planets may start to become visible to the naked eye. It marks the end of civil twilight, which begins at sunset. At civil dusk, the center of the Sun's disc goes 6° below the horizon in the evening.Astronomical twilight as seen from a plane window ![]()
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