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.
Galaxies themselves tend to be arranged into large structures called superclusters, which are in turn arranged into massive filaments separated by immense voids. The largest of these voids, the Eridanus Supervoid, has a diameter of nearly 1 billion light-years, about a 10,000 times wider than the Milky Way Galaxy.