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2019, May 15-16: Moon Passes Spica

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Step outside as the sky darkens on Wed (May 15) and Thurs (May 26).  The moon appears to pass the bluish star Spica on the two evenings.  Spica is the brightest star in the constellation Virgo.

On May 15, the moon, 11.1 days past its New phase and 90% illuminated, appears 8° above Spica.

On the next evening, the moon, one day older and 92% illuminated, is over 11° to the left of Spica.

Across these two evenings you can see the moon’s eastward movement compared to the starry background.

We notice several changes in the moon:

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