De Mairan's Nebula (also known as M43 and NGC 1982) is an H II region in the Orion constellation. It was discovered by Jean-Jacques Dortous de Mairan before 1731. The De Mairan's Nebula is part of the Orion Nebula, separated from the main nebula by a lane of dust. NGC 604, a giant H II region in the Triangulum Galaxy. ... Orion, a constellation often referred to as The Hunter, is a prominent constellation, perhaps the best-known in the sky. ... Jean Jacques dOrtous de Mairan (November 26, 1678 – February 20, 1771) was a French geophysicist. ... Events 10 Downing Street becomes the official residence of the United Kingdoms Prime Minister when Robert Walpole moves in. ... The entire Orion Nebula in visible light Optical images reveal clouds of gas and dust in the Orion Nebula; an infrared image (right) reveals the new stars shining within. ... Dust is a general name for minute solid particles of diameters less than 500 micrometers (otherwise see sand or granulates) and, more generally, for finely divided matter. ...
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