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Why Study Space?

Why Study Space?. Text 9.1, 7.1. Agenda. The Universe! The History of the Stars Distances in Space Astronomical Units Light Years Scientific Notation Why Study Space? Homework. Learning Goals. By the end of the class we should be able to

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Why Study Space?

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  1. Why Study Space? Text 9.1, 7.1

  2. Agenda • The Universe! • The History of the Stars • Distances in Space • Astronomical Units • Light Years • Scientific Notation • Why Study Space? • Homework

  3. Learning Goals • By the end of the class we should be able to • Report vast distances, like those found in space, in appropriate units • Discuss some past and current studies of space • Debate the importance of studying space

  4. The Known Universe…

  5. Past Knowledge • People on earth and watched celestial events for 1000s of years • Our ancestors followed astronomical phenomena and used patterns to mark • The passage of time • Prediction seasons • Indicate direction during travels

  6. History of the Stars • First nations used large rocks to create medicine wheels • In these circles, key rocks were aligned with bright stars • Used to predicts the right time of year to plant or harvest crops or prepare for hunting and fishing

  7. Study of the Stars • Celestial is a term that refers to the sky • Therefore objects we can see in the sky are called celestial objects • The sun, moon, earth, other planets, comets are all celestial objects • Astronomy is the study of the universe and the objects in it

  8. Speaking of History… • When you look at a celestial object, it is so far away that you are actually looking back in time • Light takes time to travel so when you see something the light is from a few billionths of a second ago • With very long distances you are looking more significantly back in time

  9. Distances in Space • Distances in space are so vast we needed special units of measurements • Astronomical units (AU) • The distance between sun and earth (150 million km) • Light years (LY) • The distance that a beam of light can travel in 1 year (63000 AU or 9000 billion km)

  10. Scientific Notation • Scientific notation helps make very large numbers shorter and easier to handle • E.g. The speed of light is about 299 800 000 m/s. Write this in scientific notation • Step 1: Move decimal place to 1st digit 2.99800000 • Step 2: Count number of places. Exponent of 8, written as 108 • Step 3: Delete zeros & rewrite 2.998 x108 m/s

  11. Practise Problem • Page 265: 1

  12. Bill Nye’s Project in Space

  13. Projects Galore! • Pioneer 10 & 11 • Launched b National Aeronautics and Space Administration • Mission was to fly past Jupiter and then continue on to the outer solar system • Voyager 1 & 2 • Launched to study Jupiter, Saturn and the outer solar system • V1 is the most distant man made object in space

  14. Voyager 1 & 2 Engravings

  15. MORE Research: Alien Life?!?!

  16. Cost of NASA

  17. Why Explore?

  18. Minds On! • Do you think it is important to fund Space Exploration? • If you were to send an object into space what information would you put on it? (Quick Lab Page 399)

  19. Homework • Finish your Minds On! • Page 265: 2-6

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