Osteopenia refers to bone density that is lower than normal peak density but not low enough to be classified as osteoporosis. Bone density is a measurement of how dense and strong the bones are. If your bone density is low compared to normal peak density, you are said to have osteopenia.steopenia refers to bone density that is lower than normal peak density but not low enough to be classified as osteoporosis. Bone density is a measurement of how dense and strong the bones are. If your bone density is low compared to normal peak density, you are said to have osteopenia.
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.
The stellar disk of the Milky Way Galaxy is approximately 100,000 light-years (9Ã1017 km) (6Ã1017 mi) in diameter, and is considered to be, on average, about 1,000 light-years (9Ã1015 km) thick. It is estimated to contain at least 200 billion stars and possibly up to 400 billion. 1 person found this useful.