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NGC 7635

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description NGC 7635 Overview

NGC 7635, designated as the Bubble Nebula, is an emission nebula situated in the constellation Cassiopeia. The structure consists of a spherical shell of gas created by the stellar wind of the massive central star, SAO 20575. The star's radiation ionizes the surrounding gas, causing it to glow. The nebula is frequently observed by astronomers studying the interaction between massive stars and their molecular environments.

help NGC 7635 FAQ

What is NGC 7635?

NGC 7635 is an emission nebula designated as the Bubble Nebula, situated in the constellation Cassiopeia. It is characterized by a massive spherical shell of gas. The nebula is a popular target for amateur astronomers due to its distinct, rounded appearance.

What creates the bubble shape in NGC 7635?

The bubble structure is created by the fierce stellar wind of its massive central star, designated as SAO 20575. The star's intense radiation pushes against the surrounding molecular cloud, ionizing the gas. This process causes the glowing gas to expand outward into space.

Where is the Bubble Nebula located in the night sky?

The Bubble Nebula (NGC 7635) is located in the northern sky within the constellation Cassiopeia. It lies at an estimated distance of roughly 7,000 to 11,000 light-years from Earth. Northern hemisphere observers can easily locate its host constellation year-round.

Can amateur astrophotographers capture the Bubble Nebula?

Yes, NGC 7635 is a highly popular target for amateur astrophotographers due to its distinct shape and vibrant colors. Capturing its faint glowing hydrogen gas usually requires a telescope equipped with specialized narrowband filters. Long-exposure imaging is necessary to reveal the intricate details of the expanding shell.

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