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A star is 10 light years away from the earth.suppose it brightens up suddenly today ,after how long can we see this change?
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A star is 10 light years away from the earth.suppose it brightens up suddenly today ,after how long can we see this change?

User Fuzzy Purple Monkey
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We will see the star brighten up 10 years later, because it takes 10 years for the light emitted from that star to reach the earth.

Light year = the distance light can travel in 1 year

10 light years = distance that takes light 10 years to travel


User Latanya
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