Why do total solar eclipse not happen every month there is a new moon
Total solar eclipses do not occur every month there is a new moon because the moon's orbit is tilted relative to the Earth's orbit around the Sun. The moon's orbit is inclined by about 5 degrees compared to the Earth's orbit, causing the moon to usually pass above or below the Earth's shadow.
During a new moon, the moon is positioned between the Earth and the Sun, and in most cases, it passes above or below the Earth's shadow, resulting in a partial solar eclipse or no solar eclipse at all.
Total solar eclipses occur when the Moon's orbit intersects with the Earth's orbital plane at the precise alignment of a new moon. This alignment is relatively rare because the moon's orbit is not perfectly aligned with the Earth's plane of orbit around the Sun, and the chances of the exact alignment occurring every month are very low.
As a result, only when the new moon happens to be aligned with the Sun and Earth's plane of orbit, and when the observer is in the narrow path where the moon's shadow falls, a total solar eclipse can be observed. This makes total solar eclipses relatively rare and special celestial events that do not occur with every new moon.