1. Galactic Address, Galaxies, and Stars

2. There’s no place like home… www.Googlemaps.com Powers of Ten videoPowers of Ten https://www.youtube.com/watch?v=FEuEx 1jnt0Mhttps://www.youtube.com/watch?v=FEuEx 1jnt0M What is your galactic address?

3. Galactic Address Name Room 226 Cinnaminson Middle School Cinnaminson Burlington County New Jersey United States of America

4. North America Northern Hemisphere Earth Solar System Milky Way Galaxy Local Group Virgo Supercluster Universe

5. Galaxies A large group of stars (million+), gas, and dust held together by gravity.

6. 4 shapes of galaxies Spiral-normal Spiral-barred Elliptical Irregular

7. Spiral - Normal

8. Spiral - Barred

9. Elliptical

10. Irregular

11. The Milky Way What happens when galaxies collide? https://www.youtube.com/watch?v=DOLJXNM4C8k&feature=related Power of Ten – Again! https://www.youtube.com/watch?v=EMLPJqeW78Q

12. Stars

13. What is a star?

14. A star is an object in space that produces its own light and heat through nuclear reactions.

15. Size of Stars Stars can be as small as Earth or as large as the orbit of Jupiter. https://www.youtube.com/watch?v=HEheh1BH34Q

16. Surface Features

17. Sunspots - cooler, darker areas.

18. Surface Features Flares – erupting columns of gas caused by sunspots.

19. Surface Features Prominences - arching columns of gas

20. Prominences Not the actual location of Earth

21. Surface Features Coronal Mass Ejections (CME’s) – electrically charged particles sent towards Earth.

22. CME’s Can disrupt radio, satellite, and phone use. Also causes auroras to occur. http://www.pbs.org/wgbh/nova/sciencenow/0304/02.html http://spaceweather.com/swpod2011/22sep11/media.mp4

23. CME’s Earth’s magnetic field helps protect us from the CME’s. http://missionscience.na sa.gov/sun/sunVideo_0 4magnetosphere.html

24. Constellations

25. What is this constellation?

26. Cassiopeia

28. Constellations Constellations are patterns of stars in the sky. Stars are organized into 88 constellations.

29. Constellations Constellations can help identify directions in the sky and time of year.

30. Constellations Constellations also may tell a story.

32. Star Classification

33. Observe a candle flame What colors do you notice? Why are there different colors? How does a candle look up close? Far away?

34. Classification Stars are organized by temperature and brightness.

35. Temperature Hot stars are blue-white Cool stars are red-yellow

36. H-R Diagram H-R Diagram - a chart used to classify stars based on temperature and absolute magnitude (brightness).

37. temperature brightness hotcool dim bright