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Dolphin Nebula (Sh2-188)

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description Dolphin Nebula (Sh2-188) Overview

Sh2-188 is a planetary nebula in the constellation Cassiopeia, sometimes called the Dolphin Nebula because of its curved appearance in deep astronomical images. It consists of material expelled by an aging star, ionized by the hot stellar remnant near its center. Its pronounced bright arc and much fainter opposing structure result from the nebula's interaction with the interstellar medium as the system moves through surrounding space.

help Dolphin Nebula (Sh2-188) FAQ

Where is the Dolphin Nebula located in the night sky?

The Dolphin Nebula is located in the northern constellation of Cassiopeia. It is positioned thousands of light-years away from Earth, making it a challenging target for amateur astronomers to observe directly.

Why is the Dolphin Nebula also known as Sh2-188?

It carries the catalog name Sh2-188 because it was officially documented in the Sharpless catalog of H II regions. This catalog was compiled by American astronomer Stewart Sharpless to map emission nebulae across the sky.

What gives the Dolphin Nebula its unique shape?

This heavily evolved planetary nebula features a striking, asymmetric arc shape rather than a perfect sphere. Astronomers believe this shape is caused by the nebula interacting with the interstellar medium as it moves rapidly through space.

What exactly is the Dolphin Nebula?

The Dolphin Nebula is an ancient planetary nebula, representing the ejected outer layers of a dying star. Over tens of thousands of years, these shells of glowing gas have expanded and evolved, leaving behind a faint, complex structure.

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