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.
At its largest point, this galaxy extends about 2 million light-years from its core, and it has a mass of about 100 trillion stars (some estimates suggest that it is 6 million light-years in diameter). To give you some idea of what this means, the Milky Way is just 100,000 light-years in diameter.