Question

Why is the distance between expressed in light years? What do you understand by the statement that a is eight light years away from the earth?

Answer 1

Answer:

What do you understand by the statement that a star is eight light years away from the earth? Answer: ... So the distance of stars from the earth is expressed in time taken by light to travel in one year. Eight light years means time taken by light to travel in eight years.

Answer 2

Answer:

bcoz distance beetween two planets is so large that it cannot be measured in units like km or m.

1 light year = 9.461×10^15 metres

so,

The statement means that a is 8 light years or 8×9.461×10^15 metres away from earth.

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