What is a Galaxy?

What is a galaxy?

• A cluster of planets 

• A cluster of millions of stars held together by gravity

What mostly makes up a galaxy? 

• Empty space

• Not empty space

Are spiral galaxies younger or older? 

• Older

• Younger

Are irregular galaxies the smallest or largest type of galaxies? 

• Largest

• Smallest

What type of galaxy (shape) do we live in? What shape is the galaxy we live in? 

• Spiral Galaxy and Milky way Galaxy

• Irregular shaped galaxy and Andromeda Galaxy

Where is Earth located in the Milky way galaxy? 

• The center of the Galaxy

• One of the spiral arms away from the center

What is at the center of our galaxy? 

• A supermassive blackhole

• The sun

What does every little tiny dot represent in the picture? 

• a star

• a galaxy 

• a planet 

How many galaxies are estimated to be in the universe? 

• 100-200 billion

• 100-200 million

• 100- 200 thousand