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The night sky is 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 ...
night sky The appearance of the Earth's sky at nighttime, when the Sun is below the horizon, and more specifically when clear weather and low levels of ambient light permit visibility of celestial objects such as stars, planets, and the Moon. The night sky remains a fundamental setting for both amateur and professional observational astronomy.
The day 's blue sky, clouds and the Moon. The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space. In the field of astronomy, the sky is also called the celestial sphere.
Light pollution is the presence of any unwanted, inappropriate, or excessive artificial lighting. [ 1 ][ 2 ] In a descriptive sense, the term light pollution refers to the effects of any poorly implemented lighting sources, during the day or night. Light pollution can be understood not only as a phenomenon resulting from a specific source or ...
Sirius. Ancient Greek: Σείριος 'the scorcher'; in Egyptian Sopdet, rendered in Greek as ΣῶθιςSōthis. As the brightest star in the sky, Sirius has proper names in numerous cultures, including Polynesian (Māori: Takurua; Hawaiian: Ka'ulua ('Queen of Heaven'), among others). Also known as the "Dog Star".
The night sky above a French chapel with the Milky Way and stars visible, and light pollution on the horizon. Night or nighttime is the period of darkness when the Sun is below the horizon. The opposite of nighttime is daytime. Sunlight illuminates one side of the Earth, leaving the other in darkness.
Astronomy should not be confused with astrology, the belief system which claims that human affairs are correlated with the positions of celestial objects.[2] Although the two fieldsshare a common origin, they are now entirely distinct. [3] Use of terms "astronomy" and "astrophysics". "Astronomy" and "astrophysics" are synonyms.
Tartarus. Uranus. v. t. e. In Greek mythology, Nyx (/ nɪks / NIX; [2] Ancient Greek: Νύξ Nýx, [nýks], "Night") [3] is the goddess and personification of the night. [4] In Hesiod 's Theogony, she is the offspring of Chaos, and the mother of Aether and Hemera (Day) by Erebus (Darkness). By herself, she produces a brood of children which are ...