NGC 7635- Bubble Nebula

NGC 7635 (sometimes known as the Bubble Nebula or C 11) is a diffuse nebula in the constellation Cassiopeia, near the border of Cepheus. Its main feature is a vacuum "bubble" surrounded by a nebula, visible with powerful instruments in the southern part of the object, caused by the stellar wind of the young central star, of magnitude 8.7. In an amateur telescope, however, the nebula is well revealed, which seems to end in the south with an arc shape.