Scorpio Constellation In Closer Look

Astronomy Science ~ Scorpio Constellation . Cosmic dust clouds dim the light of background stars. But they also reflect the light of nearby...

Astronomy Science ~ Scorpio Constellation. Cosmic dust clouds dim the light of background stars. But they also reflect the light of nearby stars. Because the bright stars tend to strongly radiate in the blue portion of the visible spectrum, and interstellar dust scatter blue light more strongly than red, dusty nebulae reflection tend to be blue.

The thin blue reflection nebula near the bright, hot stars and Pi Delta Scorpii (top left and bottom right) in the sky telescopic view of the head of the Scorpius constellation.

@apod.nasa.gov
Of course, the contrasting of red emission nebula also caused by hot star's energetic radiation. Ultraviolet photons ionize hydrogen atoms in the interstellar clouds producing hydrogen alpha line emission characteristics of red as the electrons recombine. About 600 light-years away, the nebula found in the second version of the Sharpless catalog as SH2-1 (left, with the reflection nebula VDB 99) and SH2-7. At that distance, the field of view is about 40 light-years away.
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Astronomy Science: Scorpio Constellation In Closer Look
Scorpio Constellation In Closer Look
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