Tonight – March 17, 2019 – the bright waxing gibbous moon shines in front of Cancer the Crab, the faintest constellation of the zodiac. Although the moon marks Cancer’s place in the sky on this night, the moonlit glare will make Cancer tough to see.
However, you shouldn’t have much trouble spotting some bright stars on either side of Cancer, along the zodiac. The Gemini stars, Castor and Pollux, lie to the west of tonight’s moon whereas the star Regulus, the brightest in the constellation Leo the Lion, shines to the east of tonight’s moon.
As the Earth spins beneath the heavens throughout the night, going from west to east, the moon, Cancer, the Gemini stars and Regulus will appear to move westward across the sky.
The moon will set in the west in the wee hours before sunrise March 18.
Bottom line: The bright waxing gibbous moon shines in front of Cancer the Crab, the faintest constellation of the zodiac, on March 17, 2019.