Astronomical unit and Light year

What is Astronomical unit ?

• Is the average distance from the sun to an object in space
• Is the average distance from the sun to the earth
• How long something goes through space 
• All of the above 

What is light year?

• The distance that light travels in one year
• Whenever a planet is measured in the solar system from the sun it is used as AU
• The distance of the sun and the planets around it 
• How astronomers measure the solar system 

How many kilometers does it take for light to travel in a year in space?

• about 9.64 trillion kilometers
  
• about 12.45 billion kilometers 
• about 9000 kilometers per hour 
• about 9.46 trillion kilometers
  

What is the difference between a light year and Astronomical unit?

• Light years measures in the universe but AU measures just the solar system
• Light years measures in the solar system but AU measures just the universe
• they both measure in space 
• only light year measures space and AU doesn't 

How far is Pluto in the Astronomical unit?

• 41 AU
• 39 AU
• 40 AU
• 45 AU

What is astronomical unit known as? 

• AW
• AU
• UA
• WU

How many light years does it take form our sun to Proxima Centauri? 

• 4.32 light minutes 
• 9.3 light year
• 4.24 light seconds 
• 4.24 light year