The new moon will occur on Sunday, Sept. 9, at 2:01 p.m. EDT (1801 GMT), according to NASA’s SkyCal site. The weeks before and after will offer observers views of Neptune reaching opposition on Sept. 7 and a conjunction of the moon and Jupiter on Sept. 13.
A new moon occurs when the sun and moon share the same celestial longitude, which is described by a vertical line from the north celestial pole to the south celestial pole. In August, the new moon partially eclipsed the sun, but that won’t happen this time. Solar eclipses don’t happen with every new moon, because the moon’s orbit isn’t perfectly aligned with the plane of Earth’s orbit around the sun; instead, it is tilted at an angle of about 5 degrees, so most of the time, the moon “misses” the sun in the sky
منبع : Space.com