Moon sweeps through Leo May 11 to 13

earthsky.org | 5/11/2019 | Bruce McClure
superdudea (Posted by) Level 3
Click For Photo: https://en.es-static.us/upl/2019/05/2019-may11-12-13-moon-and-regulus-300x300.jpg

On May 11 to 13, 2019, the moon is moving through the prominent constellation Leo the Lion. Watch for the moon on May 11, when it’ll be near the bright star Regulus, representing the Lion’s Heart. Also on the night of May 11, the moon will be at or near its half-illuminated first quarter phase, and its dark (or nighttime) side will be pointing right at Regulus.

The dark side of a waxing moon always points in the moon’s direction of travel relative to the backdrop stars of the zodiac. Although – on any given night – the moon will move westward because of the Earth’s rotation, the moon’s orbital motion will actually cause to moon to travel eastward. Thus from the night of May 11 to the following night, May 12, the moon moves toward Regulus. The moon moves one-half degree (its own diameter) eastward per hour in front of the constellations of the zodiac – or about 13 degrees eastward per day.

Note - Moon - Nightfall - May - Darkness

Note where the moon appears relative to Regulus at nightfall May 11 and then again as darkness falls on May 12, and the change in the moon’s position will be obvious.

By May 13, the moon will have moved again on your starry dome, as it pursues its endless orbit around Earth. On May 13, the moon will...
(Excerpt) Read more at: earthsky.org
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