When Alan Webster's parents tell him that they have to move, the 17-year-old student is understandably upset - but not nearly as much as when he learns their destination is the planet Alturus, 85 billion miles away.
Did You Know?
At a point Mara tells Alan that Alturus is 85 billion miles away from planet Earth. 85 billion miles are equivalent to 14.4 light years. See more