Tuesday , January 26 2021

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

The moon illuminates before midnight today, Friday, October 9, 2020, followed by a moment Last square At 02:39 local time in Cairo (00:39 GMT), it cuts three-quarters of its orbit around the Earth during the month.

The moon is seen at the top of the celestial dome at the beginning of dawn, Saturday, in the background of the blue sky, and will be visible until noon depending on local time.

Of course, the moon rotates around the earth every four weeks, and as a result, it is a cycle of phases in conjunction, with the crescent at the beginning of the month, the first squaring, with an ever-increasing juxtaposition, then the full moon and then the hump, then the last quarter and the end of the month. and returns to conjunction every 29.5 days. This movement means that the moon moves rapidly across the sky, from one night to the next, the moon cuts 13 degrees in the dome of the sky, which puts the moon up and sets an hour later every day.

Considering the period of the last quarter, half of the moon and the other half appear dark, an ideal time to observe the lunar surface with binocular topography or a small telescope, because the mountains, craters, etc. are very bright, especially due to light and shadow interference. along the line that separates the dark side. 3D view, ideal for monitoring and photography.

According to the Jeddah Astronomical Society, in the coming days, the distance between the moon and the sun will shrink in the celestial dome until the moon becomes a crescent phase at the end of the month and will be observed before sunrise to fall in 1441 Rabi ‘al-Awwal.

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