as the halo, which is a diffuse spherical region, surrounds the disk. It has a low density of old stars mainly in globular clusters. The halo is believed to be composed mainly of dark matter which supposedly extends beyond the edge of the disk. Overall, the Milky Way has a unique structure with an unimaginable amount of stars, planets, nebulae, clusters, and even gas and dust.
             The age of the Milky Way is a difficult concept to grasp. It is necessary to know about the evolution and formation of the galaxy to have a sufficient understanding of our universe. "A team working with the Very Large Telescope in Chile report that our galaxy is 13.6 billion years old, give or take 800 million years. This was determined by measuring the amount of the element beryllium in two stars in a so-called globular cluster. The beryllium content of stars rises with time, so it can be used as a 'cosmic clock' to calculate their ages" (Rincon 1). Since the oldest stars are generally found in large stellar clusters,
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