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The Ring Nebula (also catalogued as Messier 57, M57 and NGC 6720) is a planetary nebula in the northern constellation of Lyra. [4] C] Such a nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf , expels a vast luminous envelope of ionized gas into the surrounding interstellar space .
The specifications for a given lens typically include the maximum and minimum aperture (opening) sizes, for example, f /0.95 – f /22. In this case, f /0.95 is currently the maximum aperture (the widest opening on a full-frame format for practical use [8]), and f /22 is the minimum aperture (the smallest opening). The maximum aperture tends to ...
Splayed arch tops the splayed window opening. In architecture, a splayed opening is a wall opening that is narrower on one side of the wall and wider on another. When used for a splayed window, it allows more light to enter the room. In fortifications, a splayed opening is used to broaden the arc of fire (cf. embrasure, loophole). [1]
PGT Innovations Inc (NYSE: PGTI) agreed to acquire Anlin Industries, also known as Anlin Windows & Doors, for a purchase price of ~$126 million. The Clovis, California-based Anlin, a brand for ...
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comparison wire gauge sizes: Image title: Comparison of SWG (red), AWG (blue) and IEC 60228 (black) wire gauge sizes from 0.03 to 200 mm² to scale on a 1 mm grid, by CMG Lee. In the SVG file, hover over an item to highlight it. Width: 100%: Height: 100%
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An American Airlines flight departing New York's LaGuardia Airport on Thursday evening had to divert to nearby John F. Kennedy International shortly after takeoff after a reported bird strike ...