1. Eric Angat Science Teacher

2. Essential Question What is Earth’s role in space?

5. 2. What is the Universe? The universe is a huge wide- open space that holds everything from the smallest particle to the biggest galaxy. No one knows just how big the Universe is.

6. Write 5 vocabulary words

7. A galaxy is a system of stars, planets, satellites, and others held together by gravity.

10. The Basic types of galaxy are spiral, elliptical, and irregular. 5. Describe the basic types of galaxies. 1.Spiral galaxy: _____________ 2.Elliptical galaxy: ___________ 3.Irregular galaxy: ___________

11. Elliptical galaxies are spherical to elongated, football-like shapes

12. Irregular galaxies Non-symmetrical shapes.

13. Spiral galaxies are the most numerous among the larger galaxies. The nearest spiral galaxy to us is the Andromeda Galaxy, which is 2,300,000 light-years away from us. Our Milky Way Galaxy is a spiral galaxy.

14. 6. How do scientists observe the Galaxies in the Universe? __________________________________________

15. Our solar system is in a galaxy called the Milky Way. Scientists estimate that there are more than 100 billion galaxies scattered throughout the visible universe. Astronomers have photographed millions of them through telescopes.

16. The Milky Way has a diameter of about 100,000 light-years. The solar system lies about 25,000 light-years from the center of the galaxy. There are about 100 billion stars in the Milky Way.

17. The speed of light in vacuum, 299,792,458 meters per second and is about 186,282 miles per second. http://www.youtube.com/watch?v=Rj1sDWjvgjM

19. http://www-bioc.rice.edu/pblclass/6th%20grade/astronomy/star%20life.pdf

26. Universe and Galaxy Galaxy Universe Stars Planets Asteroids Comets And many more Spiral Irregular Elliptical galaxies are all found in the universe. Contains everything.

27. Seasons and distance from the Sun http://dolio.lh.net/~apw/astro/sun.html Winter -USA Summer-USA Summer -Australia Winter-Australia

28. Web Links  http://www.nasa.gov/worldbook/galaxy_worl dbook.html http://www.nasa.gov/worldbook/galaxy_worl dbook.html  http://starchild.gsfc.nasa.gov/docs/StarChild/ universe_level1/universe.html http://starchild.gsfc.nasa.gov/docs/StarChild/ universe_level1/universe.html  http://ircamera.as.arizona.edu/NatSci102/Nat Sci102/lectures/galaxytypes.htm http://ircamera.as.arizona.edu/NatSci102/Nat Sci102/lectures/galaxytypes.htm  http://library.thinkquest.org/J0113067/TypesO fGalaxies.htm http://library.thinkquest.org/J0113067/TypesO fGalaxies.htm  http://www.public.iastate.edu/~astro.505/Ibe nTutST/iben1.html