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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 .
The rating does not designate films as pornographic or obscene, but simply that the content is suitable only for adults. [1] The rating may be issued because of violence, sex, drugs, or other elements. [1] The NC-17 rating replaced the X rating in 1990 as the X rating was not trademarked by the MPA and had been co-opted by the pornography ...
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 sky's brightness varies greatly over the day, and the primary cause differs as well.
The Videogame Rating Council (V.R.C.) was introduced by Sega of America in 1993 to rate all video games that were released for sale in the United States and Canada on the Master System, Genesis, Game Gear, Sega CD, 32X, and Pico. The rating had to be clearly displayed on the front of the box, but their appearance in advertisements for the video ...
The dark-sky movement is a campaign to reduce light pollution.The advantages of reducing light pollution include an increased number of stars visible at night, reducing the effects of electric lighting on the environment, improving the well-being, [1] health [2] and safety [3] of people and wildlife, [4] and cutting down on energy usage.
Fox News – which was first to declare Trump the winner – garnered an average of 10.3 million viewers between 8pm and 11pm ET on Tuesday evening, according to Nielsen data
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Olbers's paradox says that because the night sky is dark, at least one of these three assumptions must be false. Olbers's paradox , also known as the dark night paradox or Olbers and Cheseaux's paradox , is an argument in astrophysics and physical cosmology that says the darkness of the night sky conflicts with the assumption of an infinite and ...