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.
How Big are Galaxies? A minority of the galaxies in the universe are irregular galaxies, which have irregular shapes or structures, and no symmetry in their rotation. The Andromeda Galaxy is the closest to the Milky Way Galaxy, at 2.2 million light-years away. Most of the visible stars in our galaxy are main sequence stars, which bear resemblance to our sun. Our galaxy, the Milky Way, is believed to have up to 400 billion stars.