StarsTrick brain teasers appear difficult at first, but they have a trick that makes them really easy.
Sirius is one of the closest stars to the earth. It is 8.7 light-years away but is moving towards us at 8km per second. Wolf is another of our closest stars and is 7.7 light-years away. It is moving AWAY from us at 13km per second. When Wolf has travelled one light-year, what will be the closest star to the earth?
AnswerThe Sun. However much the other stars move, the sun will always be the closest.
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