On May 18, 2007, the crescent moon and Venus formed a beautiful pair against the waning light of dusk.  The sight greeted me quite unexpectedly as I stepped out of a building in Nazareth, Pennsylvania, armed with only a simple "point 'n shoot" camera and tripod.  Though the moon is in its crescent phase, its full disk is faintly illuminated by earthshine—sunlight reflected back to the moon by the Earth itself.  The three faint stars appearing below Venus are those in the northernmost leg and foot of Gemini, the twins.