The Bubble Nebula, also known as NGC 7635, is a beautiful emission nebula located in the Cassiopeia constellation, about 7,100 light-years away from Earth.

It looks like a glowing soap bubble in space. The bubble is created by the strong stellar wind from a hot, massive O-type star called BD+60°2522. This wind blows the surrounding gas outward, forming a round bubble about 7 light-years wide.

The nebula glows brightly because the star’s radiation makes the surrounding gas shine. In telescope or astrophotography images, it often appears red and blue, showing the hydrogen and oxygen gases.

The Bubble Nebula is a favorite target for astronomers and astrophotographers because of its perfect shape and stunning beauty.

Bubble Nebula NGC 7635 Introduction