Age of the Universe Essay

1846 Words Jan 13th, 2013 8 Pages
Age of the Universe

The age of the universe is said to be about 13.75 billion years old. The method used in determining this age would be attempting to find the age of chemical elements, oldest star clusters, as well as white dwarf stars. Scientists also try to find the universes rate of expansion, and behavior of globular clusters, which are spherical collection of stars. In order to find this, scientists can use radioactive decay to determine how old a given mixture of atoms is in rock samples. In order to find the rate of expansion of the universe, The Hubble constant was the basic cosmological model dependent on density and composition of the universe. Some formulas used by The Hubble Constant is that the earth is composed of
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(n.d.). Anthropological Study of Workers, Occupational Health, Public Health, Textile Workers. Retrieved January 14, 2013, from

The Origin of Life. (n.d.). RCN D.C. Metro | High-Speed Internet, Digital Cable TV & Phone Service Provider. Retrieved January 14, 2013, from

Ancient Life

Radiometric dating is used to date materials based on comparison between the observed abundance of a naturally occurring radioactive isotope and its decay rate (1). Some different types are radiocarbon dating, potassium-argon dating, and uranium-lead dating. They provide important information about fossil ages and the rate of evolutionary changes. Radiocarbon dating is used to estimate the remains of materials with carbon as of 58000 to 62000 years ago (2). Potassium-argon dating is used to measure the product of radioactive decay of an isotope of potassium into argon. This method works for calculating the age of samples a little over a few thousand years. Uranium-lead dating on the other hand, can estimate the age range of a sample from about 1 million to 4.5 billion years ago (3). This method has two separate decay chains, uranium series, and actinium series, occurring by a series of alpha

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