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Exploring Scale: From Microcosm to Macrocosm

From the minuscule scale of a pencil tip to the vast expanse of galaxies, this informative guide delves into the various units of measurement in our world and universe. Discover how the width of a finger compares to the width of a hand, and how the size of a classroom scales up to the length of a football field. Explore the distances between cities, the width of Turkey, the diameter of the Earth, and even the distance to the Moon. Delve into astronomical units like AU (Astronomical Units) and light-years, learning about the vast distances within our galaxy and beyond. Join us on a journey of exploration through the scales in our world and the universe.

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Exploring Scale: From Microcosm to Macrocosm

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  1. Scales in our World 1 mm  pencil 10-3 m 1 cm  width of your finger 10-2 m 10 cm  width of your hand 10-1 m 1 m  a long step 100 m 10 m  width of the classroom 101 m 100 m  length of a football field 102 m 1000 m = 1 km  size of our campus 103 m 10 km  size of a small city 104 m 100 km  typical distance between cities 105 m 1,000 km  width of Turkey 106 m 10,000 km  diameter of the Earth 107 m 100,000 km  ¼ distance to the Moon 108 m

  2. Scales in the Universe • Two new units must be defined: • AU: Astronomical Units  Distance Earth - Sun = 150,000,000 km • Lightyear  The distance light travels in one year = 65,700 AU = 9,5 1015 m • 1 AU  distance to the Sun ~1011 m • 10 AU  Sun – Saturn distance ~1012 m • 50 AU  Sun – Pluto distance 7.5x1012 m • 50,000 AU = 0.8 ly  Sun’s sphere of influence 7.5x1015 m • 3 ly  Nearest stars 28.5x1015 m • 100,000 ly  size of our galaxy 1021 m • 2,000,000 ly  distance to the nearest galaxy 2x1022 m • 50,000,000 ly  size of our local cluster 5x1023 m • 10,000,000,000 ly  size of the known universe 1026 m

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