Friday .. the last quarter of the moon in the sky of the Arab world



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The moon lights up, before midnight, today, Friday 09 October 2020, followed by a moment Last square At 2:39 am local Cairo time (00:39 GMT), cutting off three-quarters of its orbit around Earth during the month.

The moon is observed high in the dome of the sky in conjunction with the onset of sunrise on Saturday against a blue sky background, and will remain visible until it sets at noon according to local time.

The moon is known to revolve around the earth once every four weeks, and the result is a cycle of conjunction phases, the crescent at the start of the month, the first quadrature, passing through the crescent hunchback, then the full moon. , then the waning bump, then the last quarter and the crescent of the end of the month, and it comes back to the conjunction again every 29.5 days, This movement also means that the moon is moving rapidly across the sky. From one night to the next night, the moon cuts 13 degrees in the dome of the sky, causing the moon to rise and set about an hour late each day.

The last quadrature period is considered, half the moon and the other half appear dark, the perfect time to observe the topography of the moon’s surface with binoculars or a small telescope, as mountains, craters, etc. . are very clear, especially along the line that separates the light side from the dark side due to the interference of light and shadows, resulting in 3D View, ideal for surveillance and photography.

According to the Jeddah Astronomical Society, in the coming days the distance between the moon and the sun in the dome of the sky will decrease until the moon becomes crescent at the end of the month and observes shortly before sunrise. sun in preparation for its fall in the conjunction of Rabi al-Awwal 1441.

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