Answer :
If there is a 1st quarter moon on July 9, The approximate date of the next new moon is 30 July.
It is July 31st because A full Moon appears every 29.5 days. This is the time it takes for the Moon to go through one whole lunar phase cycle.
During the relaxation of the month, we see elements of the daylight aspect of the Moon, or phases. these eight levels are, in order, new Moon, waxing crescent, first area, waxing gibbous, complete Moon, waning gibbous, 1/3 area, and waning crescent. The lunar phase cycle repeats as soon as a month (every 29. five days).
The Moon presents these eight stages one after the alternative because it acts via its cycle every month. It takes 27 days for the Moon to orbit Earth. that means the Moon's cycle is 27 days long..
Learn more about Moon cycle here:-https://brainly.com/question/13538936
#SPJ4