1. Living in the Light of the Sun Image courtesy of SOHO/NASA/ESA

2. What is a star? n Ball of gases held together by it’s own gravity n A star produces it’s own light because of the burning gases

3. What is a solar system? n A star and everything that revolves around that star n Only 1 star in a solar system n Two hundred billion solar systems in our galaxy

4. The Milky Way n The galaxy that we live in n Our solar system in 1 of billions in the Milky Way n A spiral galaxy

5. Center of our Solar System n The Sun - –largest body in our solar system n Star n Everything in our solar system revolves around the Sun n Sun is made of helium and hydrogen Image courtesy of SOHO/NASA/ESA

6. What is in our solar system? n Inner Planets n Outer Planets n Asteroids, Meteorites, and Comets

7. Inner Planets n Mercury n Venus n Earth n Mars © 1998-2002 Sol Company. All Rights Reserved

8. Outer Planets n Jupiter n Saturn n Neptune n Uranus n Pluto http://rst.gsfc.nasa.gov/Sect19/Sect19_14.html

9. What are satellites? n Any object that orbits or revolves around another object n The moon is a satellite of the Earth n The Earth is a satellite of the Sun Copyright 1995-2003 - SpaceDaily

10. Other objects in space n asteroids n meteorites n comets

11. Planetary Revolution n planets revolve counterclockwise around the Sun n gravitational pull of the Sun keeps the planets revolving

12. Planetary Rotation n n Planets rotate (spin) on their axis n counter clockwise rotation n Planets with counter clockwise rotation –Mercury, Earth, Mars, Jupiter, Saturn, Neptune and the Sun n Planets with clockwise rotation –Venus, Uranus, and Pluto