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The term '''night sky''' refers to the [[sky]] as seen at night. The term is usually associated with [[astronomy]], with [[reference]] to views of [[celestial]] bodies such as [[stars]], the [[Moon]], and [[planets]] that become visible on a [[clear]] night after the [[Sun]] has set. Natural [[light]] sources in a night sky include moonlight, starlight, and airglow, depending on location and [[timing]]. [[Weather]] phenomenon such nighttime thunderstorms can dominate the [[sky]], and transient [[events]] such as a [http://en.wikipedia.org/wiki/Great_comet great comet].

The term '''night sky''' refers to the [[sky]] as seen at night. The term is usually associated with [[astronomy]], with [[reference]] to views of [[celestial]] bodies such as [[stars]], the [[Moon]], and [[planets]] that become visible on a [[clear]] night after the [[Sun]] has set. Natural [[light]] sources in a night sky include moonlight, starlight, and airglow, depending on location and [[timing]]. [[Weather]] phenomenon such nighttime thunderstorms can dominate the [[sky]], and transient [[events]] such as a [http://en.wikipedia.org/wiki/Great_comet great comet].