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).
RE: What is the appoximate physical diameter in light-years in this problem? A globular cluster of stars is measured to have an angular diameter of 20.6 arcseconds, and its distance from the Earth is measured to be 200,000 light-years?A) 200,000 ly B) 20 ly C) 2 ly D) 1/20 ly. just now. Report Abuse. Anything has an angular diameter of 1 degree at a distance of about 57.3 times its diameter, and in inverse proportion, so 1 minute (= 60 seconds) at 3440 times, so 20.6 seconds at almost exactly 10000 times. The correct answer is B.