Question

A star is 4.3 light years away from the earth.What does it mean?

Answer 1

One light year is the distance traveled by light in one year
One light year = 9.4607 x 10∧12 km
So 4.3 light years = 4.3 x 9.4607 x 10∧12 km
                               = 4.068 x 10∧13 km

So the star is 4.068 x 10∧13 km away from the earth

Answer 2

A star is$=40.7\times10^1^2km$ away from the Earth.

Explanation:

A light year means the distance traveled by the light in a one year so we can say that it is unit of the distance and one light year is given as

1 light year = $9.46\times10^1^2km$.

Given a star 4.3 light years from the earth,

so,

4.3 light year$=4.3\times9.46\times10^1^2km$

                    $=40.7\times10^1^2km$    

Thus, a star is$=40.7\times10^1^2km$ away from the Earth.

#Learn More: light year.

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