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Table of contents

Astro 10 - Lecture 10: Our Milky Way Galaxy

Slide 2

Quick Reminders:

Brief recap (2)



Our Milky Way Galaxy

Another Galaxy Like Ours

Galaxy Properties

Parts of Our Galaxy

Open Clusters

Galaxy Properties (2)

Globular Clusters

How do we know this?

Slide 15

Slide 16

Finding the Center

How far away is the center?

Cepheid Variables

Distance and Direction of Galaxy Center

Slide 18

Slide 19

Slide 20

Slide 21

Slide 22

Slide 23

Slide 27

Where are We?

Finding the Mass of the Galaxy

Mass of the Galaxy (2)

Mass of Galaxy (3)

Rotation Curves

Slide 30

Dark Matter


Slide 36

Origin of Galaxy

Stellar Orbits

Modelling Stars and Galaxies

Galaxy Formation: Theory

Galaxy Formation: Problems

Slide 42

Center of Galaxy: Radio Observations

Center of the Galaxy: Gas Spiral

Center of Galaxy: Infrared Observations

Center of Galaxy: Theory

Center of Galaxy: Is it really a BH?

“Proving” a theory?

Slide 52

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Slide 53

What’s Next?

Author: Eric Korpela

E-mail: korpela at


Further information:
For the educational use of the Vista Astro 10 class only