1. Dust and Gases
Stars and Galaxies

2. TAKS Objective 5
The student will demonstrate an understanding of Earth and space systems.

3. TEKS Science Concepts 8.13 A, B, and C
The student knows characteristics of the universe. The student is expected to:
Describe characteristics of the universe such as stars and galaxies;
Explain the use of light years to describe distances in the universe; and
Research and describe historical scientific theories of the origin of the universe

4. Breaking News!
Show the online video Galaxies Collide featuring that dynamic newscaster Cole Ishon

5. Galaxies are classified according to shape.
About 75% of galaxies we can see are classified as spiral galaxies.

6. ELLIPTICAL galaxies show little internal structure.

7. BARRED SPIRAL galaxies feature a strong central stellar bar with the spiral arms extending out from the ends of the bar.

8. IRREGULAR galaxies show little evidence of systematic rotation.

9. Stars are classified by size and color.

10. A star’s color
Is determined by the temperature of the star.

11. Students will research the historical scientific theories concerning the origin of the universe.