While it is common for Christians and adherents of other faiths to offer a prayer in the evening, Islam specifically defines dusk as the proper moment for the Maghrib evening prayer. In some contexts, dusk is also used to denote the setting of the Sun. Other colloquial synonyms include nightfall, sundown, and eventide. In everyday language, the term dusk is commonly used as another word for evening twilight-the period from sunset until nighttime. However, even the small portion of sunlight that is still scattered across the sky before the moment of astronomical dusk may hinder astronomers from observing some of the fainter stars and galaxies.
The Sun is now 18 degrees below the horizon and the last shimmer of daylight has left the sky.Įven before astronomical dusk, during the period of astronomical twilight, the sky may look completely dark. This moment is the official beginning of night time. Most stars and constellations are now visible to the naked eye.įind the planets in the night sky Astronomical Dusk In clear weather conditions, it is now becoming difficult to distinguish the sky from land or water, making it impossible for sailors to use the horizon as a reference point when navigating by the stars. Nautical DuskĪt nautical dusk, the Sun is 12 degrees below the horizon. The 3 stages of dusk and evening twilight. The brightest stars and planets, like Venus and Jupiter, are now visible to the naked eye and more celestial bodies begin to appear in the sky. This is a good time for photographers to capture the sky and the soft glow of the sunlight.īeyond this point, artificial light is generally needed to carry out most outdoor activities. At this moment, the Earth's atmosphere still reflects a large portion of sunlight, coloring a clear sky in different shades of orange and red. It marks the end of civil twilight, which begins at sunset. Precise dusk and sunset times for your city Civil DuskĬivil dusk is when the geometric center of the Sun's disk goes 6 degrees below the horizon. Astronomical dusk – the geometric center of the Sun's disk is 18 degrees below the horizon.Nautical dusk – the geometric center of the Sun's disk is 12 degrees below the horizon.Civil dusk – the geometric center of the Sun's disk is 6 degrees below the horizon.There are 3 stages of dusk, each marking the end of 1 of the 3 phases of evening twilight: ©/SeanPavonePhoto Scientific DefinitionĪs with dawn, scientists define dusk as specific moments in time based on the solar elevation angle, which is the position of the Sun in relation to the horizon. Business Date to Date (exclude holidays).
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