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  2. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    This plot was created using the simple sunrise equation, approximating the sun as a single point and does not take into account effects caused by the atmosphere or the diameter of the Sun. The sunrise equation or sunset equation can be used to derive the time of sunrise or sunset for any solar declination and latitude in terms of local solar ...

  3. Moonrise and moonset - Wikipedia

    en.wikipedia.org/wiki/Moonrise_and_moonset

    A waxing gibbous Moon, rising over mountains with coniferous trees. The Moon's position relative to Earth and the Sun determines the moonrise and moonset time. For example, a last quarter rises at midnight and sets at noon. [5] A waning gibbous is best seen from late night to early morning. [6]

  4. Sunrise - Wikipedia

    en.wikipedia.org/wiki/Sunrise

    Sunrise seen over the Atlantic Ocean through cirrus clouds on the Jersey Shore at Spring Lake, New Jersey, U.S. Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning, [1] at the start of the Sun path. The term can also refer to the entire process of the solar disk crossing the horizon.

  5. Astronomical clock - Wikipedia

    en.wikipedia.org/wiki/Astronomical_clock

    Features include locations of the sun and moon in the zodiac, Julian calendar, Gregorian calendar, sidereal time, GMT, local time with daylight saving time and leap year, solar and lunar cycle corrections, eclipses, local sunset and sunrise, moon phase, tides, sunspot cycles and a planetarium including Pluto's 248-year orbit and the 25 800-year ...

  6. Lunar month - Wikipedia

    en.wikipedia.org/wiki/Lunar_month

    In ancient Egypt, the lunar month began on the day when the waning moon could no longer be seen just before sunrise. [1] Others run from full moon to full moon. Yet others use calculation, of varying degrees of sophistication, for example, the Hebrew calendar or the ecclesiastical lunar calendar. Calendars count integer days, so months may be ...

  7. Lunar day - Wikipedia

    en.wikipedia.org/wiki/Lunar_day

    The term lunar day may also refer to the period between moonrises or high moon in a particular location on Earth. This period is typically about 50 minutes longer than a 24-hour Earth day, as the Moon orbits the Earth in the same direction as the Earth's axial rotation.

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  9. Astronomical basis of the Hindu calendar - Wikipedia

    en.wikipedia.org/wiki/Astronomical_basis_of_the...

    Human life is regulated by the rising of the Sun and not by the movement of the Moon through a 12° arc. Hence, the position of the Moon at sunrise is used to determine the tithi prevailing at sunrise. This tithi is then associated with the entire sāvana dina. To illustrate: consider the Gregorian date 18th Sep 2021. Instead of referring to it ...