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An equilibrium is established in a typical emission nebula when the temperature equivalent of this kinetic motion is between 7000 K and 20,000 K. ... The most prominent of these in the visible spectrum is the red line of hydrogen, giving most emission nebulae a characteristic red glow. ... This process makes the star expanding,
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library.thinkquest.org/C007410/net4/stars/nebulae.shtml
library.thinkquest.org/C007410/net4/stars/nebulae.shtml
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The beautiful colors of the emission nebulae have made them very popular to study. At visible wavelengths, as in the image above, the Orion nebula is lit by the pinkish glow of excited hydrogen and the greenish glow of ionized oxygen. ... makes it an easier nebula to find, though it is not as bright in the sky as Orion. ...
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www.shawnee.cc.il.us/craigb/ast111/papers/dustinwareing...
www.shawnee.cc.il.us/craigb/ast111/papers/dustinwareing/index.htm
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(C) stars form by a top-down process (cloud collapse), but planets form by a bottom-up process (aggregation) ; (d) rotation plays no role in star formation, but is very important in planet formation ; (e) none of the above (stars and planets form in a ... 24. What ingredients are necessary to make an emission nebula?
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casa.colorado.edu/~skinners/ast1020_syll/exam1_spr99_so...
casa.colorado.edu/~skinners/ast1020_syll/exam1_spr99_solns.html
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A) By observing emission lines of highly ionized elements, like iron. ... 19. What process makes an emission nebula glow? ... A) finding the wavelength of peak emission in the continuum spectrum of the star.
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www.astro.ncu.edu.tw/~wchen/Courses/Ast101/2000s_midter...
www.astro.ncu.edu.tw/~wchen/Courses/Ast101/2000s_midterm.htm
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emission nebula: A type of nebula that shines by emitting light when electrons recombine with protons to form hydrogen atoms. The electron frequently approaches the proton in steps emitting energy as light as it gets pulled in. ... The free electrons can then begin the process of recombination. Plural of nebula: nebulae.
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antwrp.gsfc.nasa.gov/apod/lib/glossary.html
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For some nights now, we have tested the visibility of faint, large nebula in the live image of the new watec-camera. ... The edge of the illuminated building to the north is visible in most images and caused severe glow across some images. With further tweaking of setup and location better results will be acchieved.
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www.mondatlas.de/en/optik/watec/watec_largeemissionnebu...
www.mondatlas.de/en/optik/watec/watec_largeemissionnebula.html
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Usually a large telescope (8+ inches) will reveal most of the colors in an emission nebula. To see all of the colors, a long-exposure photograph is usually required. ... This process is called "accretion."
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burro.astr.cwru.edu/stu/stars_birth.html
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1. Astronomy a diffuse cloud of particles and gases (mainly hydrogen) that is visible either as a hazy patch of light (either an emission or a reflection nebula) or an irregular dark region against a brighter background (dark nebula)
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encyclopedia2.thefreedictionary.com/nebula
encyclopedia2.thefreedictionary.com/nebula
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Similar questions: What is meant by emission nebula? ... No, it's the Cone Nebula, photographed last April...Mindstretch: The gas and dust in a nebula often glow brightly. What...Universe (HarperCollins), nebulae are classified according to...reflect, or absorb light. ... The process of developing a nebula occurs slowly over a ...
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qanda.encyclopedia.com/question/emission-nebula-234660....
qanda.encyclopedia.com/question/emission-nebula-234660.html
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