Age of the Universe Essay

1864 WordsFeb 2, 20138 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…show more content…
Miller and Urey kept this going for a week and used paper chromatography to be able to show that many amino acids and some other organic molecules were now in the flask. Many other scientists have tested this experiment and found that amino acids, protein molecules, adenine, and other nucleic acid bases were present. Some theories suggest an electric spark could have helped generate these amino acids and sugars in the atmosphere, others suggest the first origins of life could have met on clay. Alexander Graham Cairns- Smith says clay could help the organic compounds become concentrated and organize into patterns similar to genes today. Some scientists theorized that life was brought from somewhere else in space rather than beginning on earth, which is also known as panspermia. In reality, no one is sure of how life began because no one was around to know, but these theories have helped us gain a sense of fascination and knowledge of how life was originated. References 7 Theories on the Origin of Life | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved January 14, 2013, from http://www.livescience.com/13363-7-theories-origin-life.html Early Earth Not So Hellish, New Study Suggests | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved January 14, 2013, from
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