5 billion km 7 the cameras of voyager 1 on feb 14

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Unformatted text preview: ortrait You are here NASA A series of pictures of the Sun and the planets taken by the Voyager 1 spacecraft from a distance of about 6.5 billion km. 7 The cameras of Voyager 1 on Feb. 14, 1990 took a series of pictures of the Sun and the planets from a distance of about 6.5 billion kilometers, making the first ever "family portrait" of our solar system. Our sun is seen as the bright object in the center of the circle of frames. See that pale, blue dot? That precious blue gem hanging majestically in the black darkness of space. That is where all your stuf is. Where everyone is born and dies. Where almost every event in human history (great or small) has happened or will happen - except for a handful of people who have been to the Moon. Ques%on: How big is Earth compared to our solar system? The Sun’s diameter is about 1.4 million km. The Earth’s diameter is about 13,000 km. Let’s reduce the size of the solar system by a factor of 10 billion; the Sun is now the size of a cantaloupe (14 cm diameter). How big is Earth on this scale? A.an atom B.a ball in the tip of a ball-point pen C.a marble D.a golf ball E.a tennis ball 8 Let’s think about the size of our Earth compared to the size of the Sun. Answer choices: A. an atom (too small to be seen at this scale) B. a ball in the tip of a ball-point pen (about 1 mm across) C. a marble (about 1 cm across) D. a golf ball (about 4 cm across) E. a tennis ball (about 7 cm across) The correct answer is B, a ball point. The Earth would be about 1.3mm across on a 1-to-10 billion scale. model Sun (2000 ft or 600 m). Here, just visible, is tiny Pluto—far smaller than the head of a pin. Looking back at the model Sun, across over 6 football elds of empty space, you realize that Earth is no more than a small speck of dust orbiting close to the Sun. How does the human race even know Pluto exists? a colony of ants. This is the story of our existence—a race of explorers, 6 bill...
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This note was uploaded on 10/23/2013 for the course ASTR 100 taught by Professor Dunne during the Fall '12 term at University of Illinois, Urbana Champaign.

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