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 Express U.S. House Transportation Committee, who represented northern Minnesota. Discussion about the "Northern Lights Express" dates back at least a decade. A preliminary feasibility study was conducted around the year 2000, followed by a comprehensive feasibility study in 2006–2007. A joint powers board was established in 2007 consisting of the regional rail authorities for counties along the corridor along with representatives from Minneapolis, Duluth, and the Mille Lacs Band of Ojibwe. The name was given to the line in March 2008 by a vote of the corridor's stakeholders. A feasibility study was completed in late 2007 which evaluated service at speeds