May 15 Waxing Crescent 7% |
May 16 Waxing Crescent 13% |
May 17 Waxing Crescent Illumination: 21% |
May 18 Waxing Crescent 30% |
May 19 Waxing Crescent 40% |
On this day the Moon was in a Waxing Crescent Phase. Best seen in the west after the sun dips below the horizon at sunset. This is the first Phase after the New Moon and is a great time to see the features of the moon's surface. The moon is close to the sun in the sky and mostly dark except for the right edge of the moon which becomes brighter as the days get closer to the next phase which is a First Quarter with a 50% illumination.
Visit the May 0131 Moon Phases Calendar to see all the daily moon phase for this month.
The Waxing Crescent on May 17 has an illumination of 21%. This is the percentage of the Moon illuminated by the Sun. The illumination is constantly changing and can vary up to 10% a day. On May 17 the Moon is 4.51 days old. This refers to how many days it has been since the last New Moon. It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases.