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The Bat-Signal is a distress signal device appearing in American comic books published by DC Comics, as a means to summon the superhero, Batman.It is a specially modified searchlight with a stylized emblem of a bat affixed to the light, allowing it to project a large bat symbol onto cloudy night skies over Gotham City.
Aurora. An aurora[ a] ( pl. aurorae or auroras ), [ b] also commonly known as the northern lights ( aurora borealis) or southern lights ( aurora australis ), [ c] is a natural light display in Earth 's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic ).
Tekhelet ( Hebrew: תְּכֵלֶת təḵēleṯ; alternative spellings include tekheleth, t'chelet, techelet, and techeiles) is a highly valued dye described as either "sky blue" (Hebrew: תּכוֹל, romanized: tāk̲ol, lit. 'azure'), [1] [2] or "light blue" ( Hebrew: כחול בהיר, romanized : kāḥol bāhîr, lit. 'light 'navy ...
The common phrase " red sky at morning " is a line from an ancient rhyme often repeated with variants by mariners [ 1] and others: Red sky at night, sailors' delight. Red sky at morning, sailors take warning. [ 2][ 3][ 4] The concept is over two thousand years old and is cited in the New Testament as established wisdom that prevailed among the ...
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 ...
Sky containing different types of cirrus clouds. Cirrus ( cloud classification symbol: Ci) is a genus of high cloud made of ice crystals. Cirrus clouds typically appear delicate and wispy with white strands. Cirrus are usually formed when warm, dry air rises, causing water vapor deposition onto rocky or metallic dust particles at high altitudes.
The pure essence of purple was approximated in pigment in the late 1960s by mixing fluorescent magenta and fluorescent blue pigments together to make fluorescent purple to use in psychedelic black light paintings. This tone of purple was very popular among hippies and was the favorite color of Jimi Hendrix. Thus it is called psychedelic purple ...
The appearance of blue, green, and hazel eyes results from the Tyndall scattering of light in the stroma, an optical effect similar to what accounts for the blueness of the sky. [ 49 ] [ 50 ] The irises of the eyes of people with blue eyes contain less dark melanin than those of people with brown eyes, which means that they absorb less short ...