It would take almost 2 years for the fastest human-made spacecraft to travel from earth to europa. about how long would it take such a spacecraft to travel to wolf 359? study island

First, we need the distance of Europe and Wolf-359 from Earth.
- The distance of Europe from Earth is: 
- The distance of Wolf-359 from Earth is instead 7.795 light years. However, we need to convert this number into km. 1 light year is the distance covered by the light in 1 year. Keeping in mind that the speed of light is , and that in 1 year there are 
365 days x 24 hours x 60 minutes x 60 seconds = , the distance between Wolf-359 and Earth is


Now we can calculate the time the spaceship needs to go to Wolf-359, by writing a simple proportion. In fact, we know that the spaceship takes 2 years to cover , so

from which we find , the time needed to reach Wolf-359: