is it of any specific color?
Yes, Observers have long noted a distinctive greenish tint to the nebula, in addition to regions of red and of blue-violet
Orion Nebula
Observers have long noted a distinctive greenish tint to the nebula, in addition to regions of red and of blue-violet
open cluster of stars in the centre of orion nebular The Orion Nebula contains a very young open cluster, known as the Trapezium what does this nebula refers to? It is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion.
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Orion Nebula [SEP] Coloration
Observers have long noted a distinctive greenish tint to the nebula, in addition to regions of red and of blue-violet. The red hue is a result of the Hα recombination line radiation at a wavelength of 656.3 nm. The blue-violet coloration is the reflected radiation from the massive O-class stars at the core of the nebula. The green hue was a puzzle for astronomers in the early part of the 20th century because none of the known spectral lines at that time could explain it. There was some speculation that the lines were caused by a new element, and the name nebulium was coined for this mysterious material.