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
Under the Northern Sky (poetry collection) Under the Northern Sky (poetry collection) Under the Northern Sky () is a collection of poetry by Konstantin Balmont featuring 51 poems, first published in the early 1894 in Saint Petersburg. Formally Balmont's second book, it is considered to be his debut, since all the copies of the Yaroslavl-released "Collection of Poems" (Сборник стихотворений, 1890) have been purchased and destroyed by the author. In December 1893 Balmont informed his friend, Nikolai Minsky in a letter: "Wrote the whole lot of the new poems and in January am going to start the process of publishing a book. Expect some chastising from