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Cosmic Numbers: Space Facts and Measurements

Explore fascinating facts about the Milky Way, Sun-Earth distance, Mars travel time, atomic weights, and scientific notations. Test your knowledge of astronomical figures!

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Cosmic Numbers: Space Facts and Measurements

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  1. Guess these by writing down the numbers… • How many stars do you think are in the Milky Way? • How many kilometres away do you think our sun is from Earth? • How long do you think it would take you to fly to Mars in a rocket? • The sun is made of mainly hydrogen and helium gases. How heavy do you think a hydrogen atom is? • What do you think the diameter of a helium atom is?

  2. 200 billion = 200,000,000,000 • 150 million = 150,000,000 • About 220 days for a particular route. How many hours is This? • 220 x 24 = 5280 hours = mins • 0.00000000000000000000000167grams (3.s.f) • Hydrogen is one-quarter the weight of a helium atom. • 0.000000000001m 316,800

  3. Compare the power to the number of zeros. • Powers of 10 • 10-2 = = • 10-3= = • 10-6= = • 5.34 × • = 5.34 × 10-6 • Powers of 10 • 102 = 10 × 10 = 100 • 103 = 10 × 10× 10 = 1,000 • 106 = 10 × 10× 10× 10× 10× 10 = 1,000,000 • 1012 = 1,000,000,000,000 • 5.34 × 1,000,000 • = 5.34 × 106

  4. Write these in standard form Write these in ordinary form

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