Why is the distance between stars expressed light years what do you understand by the statement that a star is eight light year away?
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this is because distance of star from earth is very much so it is expressed in the light year. it is defined as distance travel by light in 1 year. because speed of light is very fast I.e 300000km/s
if star is eight light year away this mean distance travel by light in 8 years
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The stars are very far away from the Earth and it is not convenient to express such distances in kilo¬metres. Thus, such large distances are expressed in unit known as light year.
If we say that a star is eight light years away from Earth, it means that the light from star will reach the Earth in eight years.
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