![](https://gnitergroup.com/wp-content/uploads/2022/04/bubble-nebula.jpg)
The bubble nebula is an emission nebula found 7100 light-years from Earth in the star Cassiopeia. (Also known as NGC 7635)
![](https://gnitergroup.com/wp-content/uploads/2022/04/E1N53GVWUAUrFgQ-1024x1024.jpeg)
The bubble formed around the nebula, which is about 7 light-years in diameter, due to the stellar wind emanating from the giant star SAO 20575, which shines brightly in the center.
![](https://gnitergroup.com/wp-content/uploads/2022/04/220px-Bubble_Nebula.jpg)
The star in the center is brighter than our Sun and 45 times the mass of the Sun.
![](https://gnitergroup.com/wp-content/uploads/2022/04/BubbleNebHST_kakitsev2048-1024x973.jpg)
It was discovered in 1757 by William Herschel.
![](https://gnitergroup.com/wp-content/uploads/2022/04/tdih-william-herschel-discovers-uranus-gettyimages-463908781-1024x1024.jpg)
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