The expansion of the Universe cause the temperature and density to drop too low for fusion to occur. Heavier elements did form, but they didn't survive the process that made the earliest stars and galaxies. The laws of physics prohibit the formation of elements heavier than helium, except in stars All of the above. None of the above. An astronomer needs to measure the distance to a globular cluster of stars that is part of the Milky Way.
Globular clusters orbit the center of the Milky Way in very elliptical orbits.
In the bulge where it is dense. In the halo, because that's where they spend the most time. In random locations in the disk and bulge. Being eaten by the supermassive black hole at the center of the Galaxy. By winning the debate with Drs.