Flail Chest (Definition) Flail chest is a life threatening medical condition in which multiple segments of the rib cage have been broken and are loosened. These segments cause severe bruising and damage to the lung. ...Read more.
The Milky Way is the second-largest galaxy in the Local Group, with its stellar disk approximately 100,000 ly (30 kpc) in diameter, and, on average, approximately 1,000 ly (0.3 kpc) thick.
Our own galaxy, the Milky Way, is a large disk-shaped barred-spiral galaxy about 30 kiloparsecs in diameter and a kiloparsec thick. It contains about two hundred billion (2Ã1011) stars and has a total mass of about six hundred billion (6Ã1011) times the mass of the Sun.