Sirius is one of the closest stars to the earth. It is 8.7 light years away but is moving towards us at 8 km per second. Wolf is another of our closest stars and is 7.7 light years away. It is moving away from us at 13 km per second. When Wolf has travelled one light year, what will be the closest star to the earth?
Answer
The Sun. However much the other stars move, the sun will always be the closest.
