Mare Crisium, or the 'Sea of Crises', can be spotted on the night of May 30 as an oval-shaped dark patch on the moon's ...

To do so, you simply draw an imaginary line from the top point of the crescent, past the bottom point of the crescent, and ...

But through an artistic understanding of light and shadow and engineer’s understanding of geometry, Leonardo was able to ascertain where the ashen glow around the crescent moon came from ...

Starting May 16, the crescent moon will have a "ghostly" moon ... out the "ancient astronomical riddle" that caused the eerie moon shadow, according to NASA. The "ashen glow" of this week's ...