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.
It is the largest galaxy in the local cluster. It has a mass of 400 billion solar masses. (One solar mass is equal to the sun's mass, or 1,989,100,000,000,000,000,000,000,000,000 kilograms.) Compared to Milky Way. The Andromeda Galaxy is 2.5 times as long as the Milky Way.