NGC 7635, commonly known as the Bubble Nebula, is an emission nebula located in the constellation Cassiopeia. It is approximately 7,100 light-years away from Earth and is notable for its distinctive bubble shape.

It is an emission nebula about 7,100 light years from earth. (on this super-wide view, the Bubble is at lower left next to bright star. FYI…That bright star is 45 times larger than our sun.

The Bubble Nebula is formed by the intense stellar winds produced by its central star, which moves at speeds exceeding 4 million miles per hour. These winds push surrounding gas and dust outward, creating the nebula's characteristic bubble shape.