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Planet.3.Astar is 10 light years away from the earth. Suppose it brightens up suddenly today, after how long can we see this change?

Planet.3.Astar 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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planet.3.Astar 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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User GDroid
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1 Answer

1 vote
After 10 years, I guess.
answered
User Mandelbrotter
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