September 19, 2017
The moon over Kiev, Ukraine, early on Monday, with the planet Venus just above it. Early this week, the moon momentarily obscured Venus, then Mars and then Mercury, in what is known as a lunar occultation. While the occultation was difficult for most people to witness, these games of planetary peek-a-boo can be important opportunities for astronomers: http://nyti.ms/2yj8Qz4
