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The full moon of the month of Safar 1443 will be observed tomorrow, Monday, September 20, 2021 AD, which is the last full moon of the summer and is called the harvest moon at this time of year.
The head of the Jeddah Astronomical Society, Engineer Majed Abu Zahra, explained that the use of the term harvest moon for several years, which is a “popular” designation, refers to the full moons that occur in September and October, which are the months close to the autumnal equinox, noting that in September and October the moonrise time is close to the sunset time several nights in a row at the time of the phase full moon in the northern hemisphere.
He pointed out that the moon will rise from the east-northeast horizon with sunset, and he will notice that the apparent size of the moon will be large when it is near the horizon, and it may be pink. or orange, but after rising in the sky regains its small size, and this is only an optical illusion that occurs in the middle of each lunar month.
He added that the pink or orange color the moon can appear in when it rises is due to the atmosphere of our planet, as its components scatter the white light reflected from the moon, so the colors of the blue spectrum with a short wavelength are scattered, and the colors of the red spectrum with a long wavelength that reach the eyes.
And engineer Abu Zahira said that the harvest moon will reach the highest point in the sky at midnight local time, tilting to the south, and it will follow that and reach the time of completion at an angle of 180 degrees by report to the sun at 2:54 a.m. after midnight Saudi time, and it will be cut in half-orbit around the Earth for a month, and it will remain to be seen until sunset with the sunrise on Tuesday.
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