Cassiopeia
Cassiopeia is a prominent northern constellation named after the vain queen of Greek mythology. Notable for its distinctive “W” asterism formed by five bright stars, it lies along the plane of the Milky Way and contains many deep-sky objects, including the supernova remnant Cassiopeia A and star‑forming regions such as IC 63.
Source: nasa.gov
APODs including "Cassiopeia"
The Bubble
16/07/2004
Blown by the wind from a star, this tantalizing, ghostly apparition is cataloged as NGC 7635, but known simply as The Bubble Nebula. Astronomer Ken Crawford's striking view combines a long exposure through a hydrogen alpha filter with color images to reveal the intricate details of this cosmic bubble and its environment. Although it looks delicate, the 10 light-year diameter bubble offers evidence of violent processes at work. Seen here above and left of the Bubble's center is a bright hot star embedded in telltale blue hues characteristic of dust reflected starlight. A fierce stellar wind and intense radiation from the star, which likely has a mass 10 to 20 times that of the Sun, has blasted out the structure of glowing gas against denser material in a surrounding molecular cloud. The intriguing Bubble Nebula lies a mere 11,000 light-years away toward the boastful constellation Cassiopeia.