Tonight, October 29, 2023, marks the occurrence of the First Quarter Moon, a phase that indicates we are midway between the New Moon and the Full Moon. According to NASA, 49% of the moon will be illuminated, providing an excellent opportunity for lunar observation.
As the moon progresses through its phases, it becomes increasingly brighter each night. This evening, viewers can expect to see several prominent lunar features, including the Mare Vaporum, Mare Fecunditatis, and Mare Serenitatis. For those equipped with binoculars, additional details such as the Endymion Crater, Posidonius Crater, and the Apennine Mountains will be visible. A telescope will allow for an even closer look, revealing the landing sites of the Apollo 16 and Apollo 17 missions, as well as the Rima Ariadaeus.
The next full moon is anticipated to occur on November 5, continuing the cycle of lunar phases. Understanding these phases is essential, as they result from the moon”s 29.5-day orbit around Earth, influenced by the changing angles between the Sun, Moon, and Earth. The moon”s appearance varies from full visibility to partial illumination and even complete darkness, but it is important to note that we always observe the same side of the moon.
The eight primary phases of the moon include: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter (or Last Quarter), and Waning Crescent. Each phase reflects a different portion of the moon”s surface illuminated by sunlight, depending on its position in relation to the Earth and Sun.
