The new moon occurs on June 25. A day later, Mercury reaches its highest point in the evening sky, and on June 27, the young moon will make a close pass to the planet.
The exact moment of the new moon phase occurs at 6:31 a.m. Eastern Daylight Time (1031 UTC), in New York, according to the U.S. Naval Observatory. A new moon describes the moment when the sun and moon share a celestial longitude (called right ascension by astronomers), a projection of Earth's longitude lines on the sky measured eastward from the point where the sun crosses the celestial equator.
