1. The History of the Universe Spaceship Earth The Human Adventure of Astronomy

2. A brief view of the steps that led to us…

3. Each day represents about 38 million years

4. On the Cosmic Calendar, in what month did the Milky Way form? A) February B) May C) July D) September E) December

5. On the Cosmic Calendar, in what month did our solar system form? A) February B) May C) July D) September E) December

6. On the Cosmic Calendar, on what date did humans first appear on earth? A) New Year’s Day B) Valentine’s Day C) Memorial Day D) Halloween E) New Year’s Eve

7. Motion of the surface of Earth due to rotation ~ 1000 mph ~ 780 mph

8. Motion of the Earth due to revolution 107,000 km/hr (Astronomical Unit) ~ 67,000 mph

9. Motion of the solar system with respect to the galaxy > 100,000 km/hr And our galaxy moves with respect to other galaxies, too! ~ 480,000 mph

10. And galaxies move relative to each other… The Local Group > 350,000 mph

11. The flow of galaxies in our supercluster 500 million ly across

12. The raisin cake analogy for the expansion of the universe The universe is expanding

13. A summary of all the motions…

14. Aristotle Aristarchus Ancient Views of the Universe But the evidence wasn’t convincing at the time…

15. Copernicus Proposed the Sun- centered model again Kepler First to propose the correct model of planetary orbits Galileo Provided solid evidence that the Earth orbits the Sun Developments in the 1500’ and 1600’s

16. Harlowe Shapley Measured the size of our galaxy. Showed we are not in the center of that, either. Edwin Hubble Measured distances to other galaxies. Discovered the expansion of the universe. Developments in the 20 th century

17. And we continue to explore and extend our reach Curiosity – Mars Cassini – Saturn New Horizons – Pluto, and beyond!

18. Astro-Cash Cab! Jonathon Hazard Jessica Chiles Nick Smith Derek DiThomas Rebecca Lopez

19. 1) True or False? People who live in Alaska are moving faster than people who live in Ecuador.

20. 2) Name one space probe we’ve put up to explore our solar system

21. 3) On the Cosmic Calendar, in what month did the Sun and planets form? March June September December

22. 4) The average distance from the Sun to the Earth is called a(n) … ?