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Adam Dahlberg (born January 17, 1993), known online as SkyDoesMinecraft, Sky Does Everything and NetNobody, is an American YouTuber mainly known for formerly producing family-friendly content related to Minecraft.
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Sky Map is an Android planetarium software application. [2] [3] History. Sky Map was designed and developed by a group of Google engineers in Pittsburgh, Pennsylvania ...
The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky's brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution .
A dark-sky preserve status enables high-quality astronomical observation in Paranal Observatory. [1] A dark-sky preserve (DSP) is an area, usually surrounding a park or observatory, that restricts or reduces light pollution or maintains and protects naturally dark night skies. Different terms have been used to describe these areas as national ...
Sky brightness refers to the visual perception of the sky and how it scatters and diffuses light. The fact that the sky is not completely dark at night is easily visible. If light sources (e.g. the Moon and light pollution ) were removed from the night sky , only direct starlight would be visible.
The Milky Way is brighter in the Southern Hemisphere than in the North. (Photo taken at La Silla Observatory) [2]. The fact that the sky is not completely dark at night, even in the absence of moonlight and city lights, can be easily observed, since if the sky were absolutely dark, one would not be able to see the silhouette of an object against the sky.
Naval aircraft used two tones of grey over sky. Coastal Command, which carried out patrols for enemy vessel over the open sea, used white instead of sky. In the North Africa campaign a combination of "Dark Earth" and "Middle stone" were used for the top surfaces, the underside was "Azure blue". The same azure was used on day bombers overseas.