Young Moon (GIF-Movie; credits: Laurent Laveder)

Caption NASA, da "NASA - Picture of the Day" del giorno 11 Aprile 2008:"At first, he couldn't see it, but searching with binoculars along a cloudy western horizon near Sunset, photographer Laurent Laveder finally spotted a delicate Lunar Crescent. Captured in this dramatic picture on April 6th, 2008, from Bretagne, France, the Moon was only 15 h. and 38' old.
Its slight, irregular, sunlit arc opens upward just above the dark cloud bank near picture center. Of course, a crescent Moon in the early evening sky is a lovely sight often enjoyed by many. But finding the Moon when its slim crescent is still less than about 24 hours past the New Moon phase requires careful timing and planning, a challenging project even for experienced observers.
In this sighting, only about 0,8% of the Moon's disk appears illuminated.
Laveder notes that this is the youngest Moon he has spotted in 20 years of skygazing".