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The Lunation Number or Lunation Cycle is a number given to each lunation beginning from a specific one in history. Several conventions are in use. The most commonly used was the Brown Lunation Number (BLN), which defines "lunation 1" as beginning at the first new moon of 1923, the year when Ernest William Brown's lunar theory was introduced in the American Ephemeris and Nautical Almanac.
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 ...
The Moon is Earth's only natural satellite.It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have synchronized the Moon's orbital period (lunar month) with its rotation period at 29.5 Earth days, causing the same side of the Moon to always face Earth.
The new "mini-moon" will be asteroid 2024 PT5, a space rock discovered earlier this year. It will be temporarily captured by Earth's gravity before continuing its journey through the solar system.
China’s space ambitions also include landing on the moon. “In the context of the new space race, the lunar landscape will be entirely different in 50 years,” Holcomb said. “Multiple ...
As The New York Times explains, “A solar year—the time it takes Earth to orbit the sun—lasts around 365 days, while a lunar year, or 12 full cycles of the Moon, is roughly 354 days.” As ...
Due to tidal locking, the same hemisphere of the Moon always faces the Earth and thus the length of a lunar day (sunrise to sunrise on the Moon) equals the time that the Moon takes to complete one orbit around Earth, returning to the same lunar phase. While the Moon is orbiting Earth, Earth is progressing in its orbit around the Sun.
The Lunar New Year is an event celebrated by billions of people across the world on the first new moon of their calendar. Although often referred to as "Lunar New Year" in English, this is a misnomer, as it refers to both celebrations based on a lunar calendar as well as a lunisolar calendar.