description Sharpless 2-157 Overview
Sharpless 2-157 is an emission nebula located within the Cassiopeia constellation. Identified by astronomer Stewart Sharpless as part of his 1959 survey of star-forming regions, it’s notable for its strong hydrogen-alpha (HII) emission lines. These lines reveal intense star formation activity within the nebula. The object is primarily studied by astronomers researching galactic evolution and the processes associated with young, massive stars.
help Sharpless 2-157 FAQ
Where in the night sky is the Sharpless 2-157 nebula located?
Sharpless 2-157 is an emission nebula located deep within the Cassiopeia constellation. It is a popular target for amateur astronomers in the Northern Hemisphere.
Who cataloged the Sharpless 2-157 nebula?
The nebula was identified and cataloged by the astronomer Stewart Sharpless. He included this object in his highly respected 1959 survey of HII star-forming regions.
What causes the distinct glow in the Sharpless 2-157 nebula?
The nebula is notable for its strong hydrogen-alpha emission lines, classifying it as an HII region. These intense lines reveal that active, violent star formation is occurring within the gas cloud.
What type of astronomical object is Sharpless 2-157?
Sharpless 2-157 is classified scientifically as an emission nebula. It represents a massive, visible cloud of glowing gas and dust actively forming new stars.
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