Night sky night sky. Aircraft are also visible at night, distinguishable at a distance from other objects because their lights blink. Night sky The term night sky, usually associated with astronomy from Earth, refers to the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight, starlight, and airglow, depending on location and timing. Aurorae light up the skies above the polar circles. Occasionally, a large coronal mass ejection from the Sun or simply
Northern Lights (online game) Northern Lights (online game) Northern Lights, abbreviated NL, is a MUD, a text-based online role-playing game, founded in 1992 by Anna "Vitastjern" Eklund. It has at times been noted as a particularly large and popular example of its type, and has received critical praise. "NL"s tagline is "The AberMUD at Ludd", reflecting its long-time hosting with the Luleå Academic Computer Society (Luleå Universitets Datorförening, hence LUDD) at the Luleå University of Technology in Sweden. "Northern Lights" is an "adventure-based" MUD, with combat and questing the primary game activities. Socialization is minimal, though the process of becoming a wizard is rumored