Reflection nebula

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The Witch Head reflection nebula (IC2118), aboot 900 licht years frae yird, is associatit witthe bricht starn Rigel in the constellation Orion. The nebula glows primarily bi licht reflectit frae Rigel, locatit juist ootside the tap richt corner o the image. Fine dust in the nebula reflects the licht. The blue colour is caused nae anly bi Rigel's blue colour but acause the dust grains reflect blue licht mair efficiently nor reid.

In astronomy, reflection nebulae are cloods o interstellar dust which reflect the licht o a nearbi starn or starns.