Sky above a perfectly flat horizon

The Milky Way in the winter constellations of northern hemisphere (left) rivals with the Zodiacal Light (sunlight reflected from dust in the plane of the Solar System) on the right. Also notable are the setting crescent moon at far right and bright planet Jupiter at the tip of the elongated Zodiacal Light along the ecliptic. As noted by the photographer “This place in Libyan desert, about 25km west of the coastal city of El Agheila, is nearly perfectly flat and a few meters below the sea level. It is so flat that the apparent horizon perfectly matches the horizon line defined by my planetarium software!” © Tunc Tezel