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.
, or more than 1,000 times bigger than the black hole in our galaxy. Hubble Helps Find Smallest Known Galaxy Containing a Supermassive ... by PR Newswire. By going over past RXTE observations, the astronomers found specific changes in brightness that helped them determine M82 X-1 measures around 400. .