A light year is approximately 9.5 million km long. 'Barnard's Star' is 6 light years away from Earth. Calculate how many millions of kilometres this is.

6 light years = 57 million km

Explanation:

Given;

A light year = 9.5 million km

To calculate how far is 6 light years;

6 light years = 6 * 1 light year = 6 * 9.5 million km

6 light years = 57 million km

57 million kilometres

Explanation:

We are given that:

1 light year = 9.5 million kilometres

To get 6 light years, we simply multiply 6 by 9.5 million kilometres:

6 light years = 6 * 9.5 million = 57 million kilometres

St Bernard's star is 57 million kilometres away from the earth.