Home > Ephemeris Program, Phases, The Moon > 05/19/2015 – Ephemeris – The crescent Moon reappears in the west

05/19/2015 – Ephemeris – The crescent Moon reappears in the west

May 19, 2015

Ephemeris for Tuesday, May 19th.  Today the Sun will be up for 14 hours and 57 minutes, setting at 9:08.   The Moon, 1 day past new, will set at 10:42 this evening, and tomorrow the Sun will rise at 6:09.

The Moon is again making its appearance in the evening sky as a thin crescent.  The crescent appearance is because the moon is mostly between the Earth and the Sun. , so we are looking at just a sliver of it is sunlit, and most is unlit by the sun.  But the Moon has the Earth in its sky, which is quite bright, and when the moon’s phase is thin, the Earth illuminates its night side with Earth light.  We call it Earthshine, when the whole Moon appears faintly inside the crescent.  It’s also known more poetically as the “Old moon in the new moon’s arms.”  The planets Venus and Mercury also exhibit crescent phases because they can be positioned between the Earth and the Sun, as Mercury is now and Venus will be next month.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.


Planetary grouping

Close grouping of, from right to left, Venus, Jupiter, Venus and the overexposed crescent Moon showing Earthshine on June 15, 1991. Credit: Bob Moler.

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