what did the scientist observe when they observed the orion?
"an unformed fiery mist, the chaotic material of future suns".
H II region
William Herschel observed the Orion Nebula in 1774, and described it later as "an unformed fiery mist, the chaotic material of future suns". 
what is h ii region? A region of interstellar atomic hydrogen that is ionized. where is it located? The Orion Nebula, the Eta Carinae Nebula, and the Berkeley 59 / Cepheus OB4 Complex. how far is it from earth? Sometimes several hundred light-years across. when was it first observed? 1610 and by whom? Nicolas-Claude Fabri de Peiresc who was he? French astronomer, antiquary and savant. did he like collecting things? Yes, he was an avid art collector. what kind of art did he prefer? He became the first admirers and supporters of Caravaggio in France. when did he first start his career as an astronomer? UNANSWERABLE what object did he use to observe the orion? Telescope can you tell me something more about it? An optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects. how many types of it are there? James Clerk Maxwell Telescope, Spitzer Space Telescope, and Hubble Space Telescope. how far can one see using the second one? From about 3 μm (0.003 mm) to 180 μm (0.18 mm). who invented the first telescope? Operated by the Joint Astronomy Centre and was named in honour of mathematical physicist James Clerk Maxwell.
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H II region [SEP] Observations
In the early 20th century, Henry Norris Russell proposed that rather than being a new element, the line at 500.7 nm was due to a familiar element in unfamiliar conditions.