Astronomy Picture of the Day -- The Flame Nebula in Visible and Infrared

NASA ^ | December 09, 2014 | (see photo credit)

[SunkenCiv]

Explanation: What lights up the Flame Nebula? Fifteen hundred light years away towards the constellation of Orion lies a nebula which, from its glow and dark dust lanes, appears, on the left, like a billowing fire. But fire, the rapid acquisition of oxygen, is not what makes this Flame glow. Rather the bright star Alnitak, the easternmost star in the Belt of Orion visible just to the right of the nebula, shines energetic light into the Flame that knocks electrons away from the great clouds of hydrogen gas that reside there. Much of the glow results when the electrons and ionized hydrogen recombine. The above false-color picture of the Flame Nebula (NGC 2024) was taken is a composite of both visible and infrared light, the later energy band being where a young star cluster becomes visible. The Flame Nebula is part of the Orion Molecular Cloud Complex, a star-forming region that includes the famous Horsehead Nebula.

[SunkenCiv]

[Credit & Copyright: Optical (RGB+Ha): Aldo Mottino & Ezequiel Bellocchio (Argentina); Infrared: ESO/J. Emerson/VISTA.]

[SunkenCiv]

The Big One

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[momtothree]

Hi Sunky! wow...... amazing!

[jonno]

Jeez - that light is pretty old!

Don't you have any fresh light?

(ducks!)

[SunkenCiv]

Somebody beam him out of here! ;’)

[TheOldLady]

Don’t stare at Alnitek. You’ll go blind.

Thank you for a great APOD, Mr. Civ.