1. Essential Question: What is a galaxy and how are they classified?
Topic: Galaxies
Essential Question: What is a galaxy and how are they classified?

2. A massive system consisting of stars and a medium of gas and dust
Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Galaxy
A massive system consisting of stars and a medium of gas and dust
Galaxies contain star clusters and multiple star systems
Put in categories base on their shape

4. Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Spiral Galaxy
Has a central bulge of old stars
Has a flat rotating disk of new stars
Has arms
A spherical halo of stars
Has a super massive black hole at the center of the central bulge
We live in the spiral galaxy, the Milky Way

5. The Milky Way

6. Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Elliptical Galaxy
Shaped like a football
Have little gas or dust
Contain mostly old stars

7. Elliptical Galaxy

8. Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Irregular Galaxy
Do not fit into the elliptical or spiral category
Have no definite shape
Frequently the result of when galaxies collide

9. Irregular Galaxy

10. Now take some time…
Take 2 minutes to go over your notes and highlight or underline the main ideas that answer the essential question, you should not highlight everything:
Essential Question: What is a galaxy and how are they classified?

11. Time to use the left hand column
You will now write your own questions using the verbs provided.

12. A massive system consisting of stars and a medium of gas and dust
Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Galaxy
A massive system consisting of stars and a medium of gas and dust
Galaxies contain star clusters and multiple star systems
Put in categories base on their shape
Choose one verb to write your question:
Define
Describe
Explain

13. Has a central bulge of old stars Has a flat rotating disk of new stars
Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Spiral Galaxy
Has a central bulge of old stars
Has a flat rotating disk of new stars
Has arms
A spherical halo of stars
We live in the spiral galaxy, the Milky Way
Choose one verb to write your question:
Define
Describe
Explain

14. Contain mostly old stars
Topic: Galaxies Essential Question: What is a galaxy and how are they classified?
Elliptical Galaxy
Shaped like a football
Have little gas or dust
Contain mostly old stars
Choose one verb to write your question:
Define
Describe
Explain

15. Now let’s write a summary
Look at each question you wrote on your own, and answer each question in a complete sentence.