Astrometry is the term used to refer to the most ancient form of astronomy. It includes the measure of the moon, planets and sun. There are calculations that are linked to the motions that allow the astronomers to model planets’ and star’s birth and evolution. In addition, it is useful in coming up with predictions of events such as meteor showers, eclipses and comets appearances.
Another related but more complex subject is cosmology that encompasses study of the universe as a whole. Such prehistoric cultures include the Nubian and Egyptian monuments and other early civilizations such as the Iranians, Maya, Chinese, Greeks, Babylonians and the Indians. There was the need to invent the telescope before astronomy made it into the modern science. Astronomy has historically included disciplines ranging from astrometry, observational astronomy, celestial navigation and making of calendars (Trumper, pg. 11). Currently, astronomy is considered synonymous with astrophysics. In the twentieth century, astronomy split into theoretical and observational branches. Observation astronomy focus on acquiring data from various observations of astronomical objects that is then analyzed using basic principles of physics. On the other hand, theoretical astronomy is oriented towards computer development or analytical models that describe the astronomical phenomena and objects (Renner et al., pg. 618).