Is it a plane? Is it a glider? No, it is something in between.
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Nikon D40
Browsing Category Sky
The sky is the part of the atmosphere or outer space visible from the surface of any astronomical object. It is difficult to define precisely for several reasons. During daylight, the sky of Earth has the appearance of a pale blue surface because the air scatters the sunlight. The sky is sometimes defined as the denser gaseous zone of a planet’s atmosphere. At night the sky has the appearance of a black surface or region scattered with stars.