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A lunar-stellar calendar, the Borana Calendar relies on astronomical observations of the moon in conjunction with seven particular stars or constellations. Borana months (Stars/Lunar Phases) are Bittottessa (), Camsa (), Bufa (), Waxabajjii (), Obora Gudda (Central Orion-Saiph), Obora Dikka (), Birra (full moon), Cikawa (gibbous moon), Sadasaa (quarter moon), Abrasa (large crescent), Ammaji ...
The lunar phases and librations in 2025 as viewed from the Northern Hemisphere at hourly intervals, with titles and supplemental graphics The lunar phases and librations in 2025 as viewed from the Southern Hemisphere at hourly intervals, with titles and supplemental graphics A full moon sets behind San Gorgonio Mountain in California on a midsummer's morning.
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.
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
The full moon is the lunar phase when the Moon appears fully illuminated from Earth's perspective. This occurs when Earth is located between the Sun and the Moon (when the ecliptic longitudes of the Sun and Moon differ by 180°). [3] This means that the lunar hemisphere facing Earth—the near side—is completely sunlit and appears as an ...
Since the period of 12 such lunations, a lunar year, is 354 days, 8 hours, 48 minutes, 34 seconds (354.36707 days), [1] purely lunar calendars are 11 to 12 days shorter than the solar year. In purely lunar calendars, which do not make use of intercalation, the lunar months cycle through all the seasons of a solar year over the course of a 33 ...
The date of lunisolar calendars therefore indicates both the Moon phase and the time of the solar year, that is the position of the Sun in the Earth's sky. If the sidereal year (such as in a sidereal solar calendar ) is used instead of the solar year, then the calendar will predict the constellation near which the full moon may occur.
English: Diagram of lunar phases. The lunar phase depends on the Moon's position in orbit around the Earth and the Earth's position in orbit around the sun. Graphics of the Earth and Moon were obtained from the NASA public domain images File:The Earth seen from Apollo 17.jpg and File:Moon_PIA00302.jpg