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Goal to explore the scale of the universe Objectives: 1) To explore planetary sizes 2) To explore star sizes/planetary distances 3) To explore distances between stars 4) To explore galaxy size 5) To explore groupings of galaxies 6) To explore the observable universe The moon • 2000 miles Mercury Earth Jupiter Sun • 110X size of Earth If sun was 1 cm in diameter • Aldeberan orbit of Mercury (40 cm) • Betelgeuse orbit of Saturn (10 m) • VY Canis Majoris orbit of Uranus (14 m) • Orbit of Neptune at 30 AU (30 m) Distances to stars • Nearest to sun, 25 trillion miles • If the diameter of the sun was 1 cm the nearest star would be 300 km away. • If Neptune was 1 cm from sun the nearest star would be 80 m away. 400 light years • If sun to Nearest star Was 1 cm Betelgeuse Would be 1 m away. 1500 Light Years http://www.ldps.ws/Mirror/Universe/galaxy.html Local group http://www.anzwers.org/free/u niverse/ Nearby region of the universe 1 billion light years Universe Conclusion • The universe is a very big place. • Its scale dwarfs everything and requires multiple scales to understand.