Harlow Shapley provided some useful information in determining some of the greatest mysterious about the cosmos. Shapley essentially believed that sun was not the center point of the galactic frontier. In the first decade of the 29th century not much was known about the Milky Way but Shapley soon hypothesized some useful arguments that suggested that our universe is much larger and diverse than we can possibly imagine. To support his argument about a non-heliocentric theory of the galactic composition, he used the powerful technology available to measure a type of celestial object known as Cepheid stars. Shapley used the behavior of these stars to determine that sun was not the center of the galaxy. By assuming that these stars were the nearly the same size he figured he could measure the luminosity of these stars and therefore figure out a linear distance to the stars. Using these distances, and some rather absurd assumptions about the limitations of the cosmos, he guessed that the our solar system was not at the center of the Milky Way.

Question 2

The idea of a cluster is simple: a grouping of objects. In astronomy groups forms for what we assume for real and important purposes. Two kinds of sidereal clustering appears in our observations of space. Globular clusters are one of these forms that helps give some clues about the nature of the universe. Globular clusters are groups of stars that appear to orbit around galaxies....

Galactic clusters, another type of formation, are much larger objects and are groupings of galaxies. Essentially they are the same types of pattern but materialized on much different relative scales.
Globular clusters may contain millions of stars. Such qualities of any clustering of stars including richness, intensity, luminosity, pattern and frequency are of great importance in finding the undermining purpose and effects of these patterns. When contemplating the idea of galactic clusters it is quiet awe inspiring and difficult to really understand the sheer sizes and distances such measurements elicit within the human psyche. Globular star clusters most likely provide more relevant information about man's place in the universe due to our closer, albeit still very differing, relation to the size, shape and scope of their form.

Question 3

It is obvious that astronomy is essentially more of an art than science. The many photographs that are taken in the observation of its actions, must be heavily processed by artificial means to gain any understanding of larger meaning. All we have are our models and little else. Testing these models is very difficult, but there are some ways that can be of use when determining the distances between galaxies.

One such way of determining interstellar distances is to observe the HII regions of a galaxy. H II regions are areas of hydrogen gas that has been ionized. The…