This year, September 15 was the so-called “Midautumn Moon” and “15 Nights” on August 15 in old calendar, and October 13 was the “Thirteen Nights” on September 13 in old calendar.
On the 15th, two days behind the "Thirteen Nights", a refreshing blue sky spreads out, and the "Mamaru no Tsuki" shines next to the Ishikawajima Lighthouse Monument in Tsukuda Park, which was lit up from the evening.
The thirteenth night is one step before the full moon.
By the way, October 16th is the full moon this year.
In any case, the moon tonight looks even more beautiful in the clear night sky.
The reason why the autumn sky is "clear and visible" is.
① When there is a large amount of water vapor in the air, the sky tends to look whitish due to the reflection of sunlight, but the air brought by the mobile high pressure from the continent in autumn is dry, so the blueness of the sky tends to be dark and clear.
② Grass grow over the summer, dust is less likely to occur, and yellow sand is less flying.
That's why.
