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.
The Milky Way is a barred spiral galaxy that has a diameter usually considered to be roughly 100,000â120,000 light-years but may be 150,000â180,000 light-years. The Milky Way is estimated to contain 200â400 billion stars, although this number may be as high as one trillion.