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  2. May 2021 lunar eclipse - Wikipedia

    en.wikipedia.org/wiki/May_2021_lunar_eclipse

    The southern part of the Moon is darkest due to it being closest to the centre of the shadow. A total lunar eclipse occurred at the Moon’s descending node of orbit on Wednesday, May 26, 2021, [1] with an umbral magnitude of 1.0112. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total ...

  3. Symbolab - Wikipedia

    en.wikipedia.org/wiki/Symbolab

    Symbolab is an answer engine [1] that provides step-by-step solutions to mathematical problems in a range of subjects. [2] It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011. In 2020, the company was acquired by American educational technology website Course Hero. [3] [4]

  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. January 2019 lunar eclipse - Wikipedia

    en.wikipedia.org/wiki/January_2019_lunar_eclipse

    Because the Moon was near its perigee on January 21, it can be described as a "supermoon". [3] As this supermoon was also a wolf moon (the first full moon in a calendar year), it was referred to as a "super blood wolf moon"; blood refers to the typical red color of the Moon during a total lunar eclipse. [4]

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  7. Libration - Wikipedia

    en.wikipedia.org/wiki/Libration

    A free physical libration is similar to the solution of the reduced equation for linear differential equations. The periods of the free librations can be calculated, but their amplitudes must be measured. Lunar Laser Ranging provides the determinations. The two largest free librations were discovered by O. Calame. [8] [9] Modern values are:

  8. Lunar observation - Wikipedia

    en.wikipedia.org/wiki/Lunar_observation

    A 10× pair of binoculars will magnify the Moon approximately as much as a 200mm camera lens can. The photos below were shot with a 200mm lens. The first photo was taken on 13 November 2016 at 6:20pm PST, observing the full Moon just hours before it would officially become the largest supermoon since 1948. The second photo was shot 24 hours ...

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