Astronomical Unit and Light Years

Front

1 light year = ?

Back

9.5 x 10^12 km

Front

What is an Astronomical Unit (A.U.)?

Back

The average distance between Earth and the Sun.

Front

How long does it take for light to travel from the Sun to Earth?

Back

8 minutes

Front

Distance of Neptune is 4.5 x 10^9 km from the Sun. Calculate its distance in A.U.

Back

30 A.U.

Front

1 A.U. = ?

Back

1.5 x 10^8 km

Front

What is the definition of a light year?

Back

The distance that light travels in one year.

Front

How many kilometers are in one light year?

Back

9.5 x 10^12 km

Front

What is the average distance from the Earth to the Sun in kilometers?

Back

1 A.U. = 1.5 x 10^8 km.

Front

If a star is 4 light years away, how far is it in kilometers?

Back

Approximately 3.8 x 10^13 km.

Front

What is the speed of light in km/s?

Back

Approximately 299,792 km/s.