Astronomy - Chapter 1 - Scientific Notation and the Structure of the Universe
Astronomy - Chapter 1 - Scientific Notation and the Structure of the Universe Physics 226
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This 2 page Class Notes was uploaded by Lexie Kostreva on Friday September 16, 2016. The Class Notes belongs to Physics 226 at University of Wisconsin - Eau Claire taught by Nathan A. Miller in Fall 2016. Since its upload, it has received 39 views. For similar materials see Astronomy-Solar System in Physics and Astronomy at University of Wisconsin - Eau Claire.
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Date Created: 09/16/16
Scientific Notation and the Structure of the Universe Scientific notation o A way of representing numbers that are very large or very small o Distance from the Earth to the Sun 150,000,000,000 m = 1.5 * 10^11 m o Diameter of an atom 0.0000000001 m = 1.0 * 10^-10 m = 0.1 nm o Calculation example (2*10^3) * (3*10^5) = 6*10^8 Units o Metric system Length Meters (m) Mass Kilograms (kg) Time Seconds (s) Temperature Celsius/Kelvin (C/K) Other units o Astronomical unit Mean distance from the Earth to the Sun 1 AU = 1.496*10^11 m o Light year Not a unit of time Distance traveled by light in one year 1 ly = 9.46*10^15 m o Speed of light 299,792,458 m/s 3.0*10^8 m/s approximately Scale of the universe 1 o Diameter of the Earth 12,756 km Scale of the universe 2 o Distance from Earth to Moon 384,400 km Scale of the universe 3 o Solar diagrams (not to scale) o Distance from Sun to Pluto 39.54 AU 9 5.916*10 km Scale of the universe 4 o Distance from Earth to the next nearest star 4.24 light years Scale of the universe 5 o Diameter of the Milky Way 100,000 light years Scale of the universe 6 o Distance to the Great Galaxy in Andromeda 2.5 million light years Scale of the universe 7 o Typical galaxy in Hubble Ultra Deep Field image 13 billion light years away