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  2. Lunar arithmetic - Wikipedia

    en.wikipedia.org/wiki/Lunar_arithmetic

    A few of the elementary properties of the lunar operations are listed below. [3] The lunar addition and multiplication operations satisfy the commutative and associative laws. The lunar multiplication distributes over the lunar addition. The digit 0 is the identity under lunar addition. No non-zero number has an inverse under lunar addition.

  3. Lunar day - Wikipedia

    en.wikipedia.org/wiki/Lunar_day

    A lunar day is the time it takes for Earth's Moon to complete on its axis one synodic rotation, meaning with respect to the Sun. Informally, a lunar day and a lunar night is each approx. 14 Earth days. The formal lunar day is therefore the time of a full lunar day-night cycle.

  4. Selenographic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Selenographic_coordinate...

    Chart of the far side of the moon with lines of longitude and latitude. The selenographic coordinate system is used to refer to locations on the surface of Earth 's moon . Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of Earth.

  5. Tithi - Wikipedia

    en.wikipedia.org/wiki/Tithi

    The astronomical basis of the Hindu lunar day. In Vedic timekeeping, a tithi is a "duration of two faces of moon that is observed from earth", known as milа̄lyа̄ (Newar: 𑐩𑐶𑐮𑐵𑐮𑑂𑐫𑐵𑑅, मिलाल्याः) in Nepal Bhasa, [1] or the time it takes for the longitudinal angle between the Moon and the Sun to increase by 12°.

  6. Lunisolar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunisolar_calendar

    Lunisolar calendars are lunar calendars but, in contrast to purely lunar calendars such as the Islamic calendar, have additional intercalation rules that reset them periodically into a rough agreement with the solar year and thus with the seasons.

  7. Astronomical basis of the Hindu calendar - Wikipedia

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

    A tithi corresponds to the concept of a lunar day. Tithi have Sanskrit numbers according by their position in the pakṣa, i.e. prathama (first), dvitīya (second) etc. The fifteenth, that is, the last tithi of a kṛṣṇa pakṣa is called amāvāsya (new moon) and the fifteenth tithi of a śukla pakṣa is called pūrṇimā (full moon). [7]

  8. What Does Each Lunar Phase Mean? How To Use The 28-Day ... - AOL

    www.aol.com/lifestyle/does-lunar-phase-mean-28...

    Full Moon. The full moon marks the high point of the lunar cycle. This is when drama unfolds and life-altering moments take place. Think of the full moon as the most climactic part of a movie ...

  9. Timekeeping on the Moon - Wikipedia

    en.wikipedia.org/wiki/Timekeeping_on_the_Moon

    Timekeeping on the Moon is an issue of synchronized human activity on the Moon and contact with such. The two main differences to timekeeping on Earth are the length of a day on the Moon, being the lunar day or lunar month, observable from Earth as the lunar phases, and the rate at which time progresses, with 24 hours on the Moon being 58.7 microseconds (0.0000587 seconds) faster, [1 ...