Question

question 2(multiple choice worth 5 points) (01.07 mc) distances in space are measured in light-years. the distance from earth to a star is 6.8 × 1013 kilometers. what is the distance, in light-years, from earth to the star (1 light-year

Answer 1

The distance in light years from earth to Star is 7.1 Light Years.

We have the distance from earth to a star is 6.8 × $10^{13}$ kilometers.

We have to convert it into light years.

What is a Light Year?

Light year is a unit of astronomical distance equivalent to the distance that light travels in one year.

1 Light year = 9.4607 × $10^{12}$ km

According to the question, we have -

Distance from Earth to Star = 6.8 × $10^{13}$ km.

Now -

1 Light year = 9.4607 × $10^{12}$ km

or

9.4607 × $10^{12}$ km = 1 Light years

1 km = $\frac{1}{9.4607\times 10^{12} }$ Light years

Therefore -

6.8 × $10^{13}$ km = $\frac{6.8\times 10^{13} }{9.4607\times 10^{12} }$ = 0.71 x 10 = 7. 1 Light Years.

Therefore, the distance in light years from earth to Star is 7.1 Light Years.

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