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Kyanite is a typically blue aluminosilicate mineral, found in aluminium-rich metamorphic pegmatites and sedimentary rock.It is the high pressure polymorph of andalusite and sillimanite, and the presence of kyanite in metamorphic rocks generally indicates metamorphism deep in the Earth's crust.
As the chords of a 12-bar blues follow a form, so does the melodic line. The melodic line might just be the melody of the piece or it might also include lyrics. The melody and lyrics frequently follow an AA'B form, meaning one phrase is played then repeated (perhaps with a slight alteration), then something new is played. [14]
It was also used as colorant, particularly in blue glass and as the blue pigment used for centuries in Chinese blue and white porcelain, beginning in the late eighth or early ninth century. [15] Cobalt glass, or Smalt, is a variation of cobalt blue. It is made of ground blue potassium glass containing cobalt blue.
Project Sign was first asserted in the 1956 book The Report on Unidentified Flying Objects by retired Air Force Captain Edward J. Ruppelt who later directed Project Blue Book. In this he also claimed that Sign had produced an "Estimate of the Situation" which endorsed an interplanetary explanation for UFOs, but General Hoyt Vandenberg , Chief ...
[16] In 1939, the cover of the book was changed from brown to a "more patriotic blue", allegedly to avoid comparison with a color associated with Nazi Germany. [17] The eleventh edition, published in 1967, was actually white with a blue border. [18] The cover color returned to blue in the twelfth edition of 1976. [19]
Aurora australis seen from the ISS, 2017 [1]. 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).
A blue flu is a type of strike action undertaken by police officers in which a large number simultaneously use sick leave. [1] A blue flu is a preferred strike action by police in some parts of the United States where police strikes are prohibited by law.