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  2. Libration - Wikipedia

    en.wikipedia.org/wiki/Libration

    The lunar phases and librations in 2019 in the Northern Hemisphere at hourly intervals, with music, titles, and supplemental graphics Simulated views of the Moon over one month, demonstrating librations in latitude and longitude. Also visible are the different phases, and the variation in visual size caused by the variable distance from Earth.

  3. Lunar Laser Ranging experiments - Wikipedia

    en.wikipedia.org/wiki/Lunar_Laser_Ranging...

    The Moon has free physical librations that require one or more stimulating mechanisms. [45] Tidal dissipation in the Moon depends on tidal frequency. [42] The Moon probably has a liquid core of about 20% of the Moon's radius. [11] The radius of the lunar core-mantle boundary is determined as 381 ± 12 km. [46]

  4. Lunar phase - Wikipedia

    en.wikipedia.org/wiki/Lunar_phase

    The Moon then wanes as it passes through the gibbous moon, third-quarter moon, and crescent moon phases, before returning back to new moon. The terms old moon and new moon are not interchangeable. The "old moon" is a waning sliver (which eventually becomes undetectable to the naked eye) until the moment it aligns with the Sun and begins to wax ...

  5. Lunar theory - Wikipedia

    en.wikipedia.org/wiki/Lunar_theory

    The perturbations on the Moon when it is nearly in line along the Earth-Sun axis, i.e. near new or full moon, point outwards, away from the Earth. When the Moon-Earth line is 90° from the Earth-Sun axis they point inwards, towards the Earth, with a size that is only half the maximum size of the axial (outwards) perturbations.

  6. Lunar standstill - Wikipedia

    en.wikipedia.org/wiki/Lunar_standstill

    The term lunar standstill was apparently first used by engineer Alexander Thom in his 1971 book Megalithic Lunar Observatories. [3] The term lunistice is from the Latin luna- (moon) + -stitium (a stoppage), and describes the extremes in the moon's varying declination. At a solstice or lunistice neither the sun nor the moon stands still; what ...

  7. 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 is the length of a day on the Moon, being the lunar day or lunar month, observable from Earth as the lunar phases, and the differences between Earth and the Moon of how differently fast time progresses, with 24 hours on the Moon being 58.7 ...

  8. Lunar month - Wikipedia

    en.wikipedia.org/wiki/Lunar_month

    In lunar calendars, a lunar month is the time between two successive syzygies of the same type: new moons or full moons. The precise definition varies, especially for the beginning of the month. Animation of the Moon as it cycles through its phases, as seen from the Northern Hemisphere

  9. Moonrise and moonset - Wikipedia

    en.wikipedia.org/wiki/Moonrise_and_moonset

    A full moon sinking behind San Gorgonio Mountain, California, on a midsummer morning. Moonrise and moonset are times when the upper limb of the Moon appears above the horizon and disappears below it, respectively. The exact times depend on the lunar phase and declination, as well as the observer's location.

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