Galaxy Review

One light year is a...

• A length of time
• A distance
• A galaxy
• A measure of gravity

Which of the following is the smallest?

• The Milky Way Galaxy
• A red giant star
• The moon
• Jupiter

Which of the following is the largest?

• The Milky Way Galaxy
• A red giant star
• The moon
• Jupiter

True or False: The sun is much bigger than most of the stars in the sky.

• True 
• False

How many stars are in an average sized galaxy?

• Hundreds
• Thousands
• Millions
• Billions

How many galaxies are in the known universe?

• Hundreds
• Thousands
• Millions
• Billions

Our galaxy is a ________ galaxy.

• Irregular
• Elliptical
• Spiral
• Twirl

At the center of most, if not all, galaxies is a _________. 

• Giant Sun
• Black Hole
• Big Bang
• White Dwarf

The sun orbits the center of the galaxy once every...

• 225 years
• 225 thousand years
• 225 million years
• 225 billion years

Who discovered that our universe is made up of more than one galaxy?

• The Hubble Telescope
• Nicolaus Copernicus 
• Galileo Galilei
• Edwin Hubble