Compact Bone. The next layer is made up of compact bone. It is a smooth but hard quality, with minimal gaps and spaces. This layer gives bones their white and solid appearance, and it is the part that you see when you look at a skeleton.
He used the inverse square law of light brightness on a particular type of variable star in those old star clusters. Some stars are very useful for finding distances to clusters and to other galaxies because they have a known luminosity that is large, so they can be seen from great distances away.ll of the RR Lyrae stars in a cluster have the same average apparent magnitude. In different clusters, the average apparent magnitude was different. This is because all RR Lyrae have about the same average absolute magnitude (=+0.6, or 49 solar luminosities).
Description of the Star Alpheratz A is a blue B8IVpMnHg subgiant star, peculiar because of the unusual strength of mercury and manganese in its spectrum. The star is 5 times larger than the sun in diameter and 110 times more luminous.The spectrum shows that the star has a companion orbiting with 96.7 day period.According to Burnham the spectrum of the companion has not been determined.he star is 5 times larger than the sun in diameter and 110 times more luminous. The spectrum shows that the star has a companion orbiting with 96.7 day period. According to Burnham the spectrum of the companion has not been determined.