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).
The neutron star exists for the same reason the degenerate dwarf star exists: degeneracy pressure counteracts gravity, so that the star ceases to shrink as it cools. But the source of this pressure in a neutron star is not electrons, as it is in a degenerate dwarf star, but degenerate neutrons and protons.This simple difference is the source for the radical difference in size between the neutron star and the degenerate dwarf.o 15 kilometers is a typical value for a neutron star's radius, compared to the typical degenerate dwarf radius of 10,000 km. A startling consequence of the small size of the neutron star is that its gravitation field is strong enough to exhibit some of the effects of general relativity.