We Have Sent Several Spacecraft on Trajectories That Will Ultimately

Multiple Choice

We have sent several spacecraft on trajectories that will ultimately take them into interstellar space (Pioneer 10 and 11,Voyager 1 and 2,New Horizons) .How long will it take these spacecraft to travel as far as the nearest stars?

A) a few decades
B) a few hundred years
C) about a thousand years
D) tens of thousands of years