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 the diameter of 5.5 million light years, or more than 50 times the size of the Milky Way, it was the largest known galaxy in the universe. Virgo is also home to the quasar 3C 273 which was the first quasar ever to be identified.