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
Answer:D
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