description Sh2-140 Overview
Sh2-140 is an emission nebula and H II region in the constellation Cepheus, catalogued in Stewart Sharpless's list of Galactic hydrogen-emission regions. Located roughly 3,000 light-years from Earth, it forms part of a molecular-cloud complex where radiation from young, hot stars ionizes surrounding gas. Its bright rim and adjoining photodissociation region are studied to examine star formation and the interaction of ultraviolet light with interstellar material.
help Sh2-140 FAQ
What type of object is Sh2-140?
Sh2-140 is an emission nebula and H II region in the constellation Cepheus. It is a cloud of glowing gas associated with star-forming activity.
How far away is Sh2-140?
Sh2-140 is located roughly 3,000 light-years from Earth. The distance is commonly given as an approximate value because astronomical measurements have uncertainties.
What catalog includes Sh2-140?
Sh2-140 appears in Stewart Sharpless's catalog of Galactic hydrogen-emission regions. The Sh2 designation identifies it as an entry in that catalog.
Why does Sh2-140 glow?
As an H II region, Sh2-140 glows when radiation from young, hot stars ionizes surrounding hydrogen gas. It forms part of a larger molecular-cloud complex in Cepheus.
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