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Sh2-103

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description Sh2-103 Overview

Designated as Sh2-103 in the Sharpless catalog, this astronomical object is a massive supernova remnant commonly known as the Cygnus Loop. Spanning nearly three degrees in the sky, it consists of a large, filamentary nebula resulting from the explosion of a massive star. The brightest optical arcs of this structure are classified separately as the Veil Nebula, which includes distinct features like the Eastern and Western Veils. It serves as a vital subject for astronomers studying the later stages of stellar evolution and interstellar shock waves.

help Sh2-103 FAQ

What is the common name for the Sh2-103 nebula?

Sh2-103 is more commonly known as the Cygnus Loop, a massive supernova remnant located in the constellation Cygnus. Its brightest visible arcs are famous to amateur astronomers as the Veil Nebula.

How large is the Cygnus Loop in the night sky?

The Cygnus Loop spans an impressive nearly three degrees across the sky, which is roughly six times the diameter of the full moon. Its massive scale makes it clearly visible in wide-field astrophotography.

How was the Veil Nebula (Sh2-103) created?

The nebula was created by the violent explosion of a massive star reaching the end of its life, leaving behind an expanding cloud of superheated gas. The light from this supernova event is estimated to have reached Earth around 8,000 years ago.

Can you see the Veil Nebula with a regular telescope?

While the full Cygnus Loop is incredibly large, the filamentary details of the Veil Nebula are quite faint and require a large aperture telescope. However, amateur astronomers often use specialized OIII (Oxygen-III) filters to dramatically enhance its visibility.

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