The Voyager I spacecraft left Earth in 1977 traveling at about 17 km/s. If it was...
The Voyager I spacecraft left Earth in 1977 traveling at about 17 km/s. If it was headed in the right direction, in what year would it reach the nearest star, Proxima Centauri at a distance of 1.3 pc?
Homework Answers
We know that
time = distance/Velocity
Velocity = 17 km/sec = 17000 m/sec
distance between proxima centauri and earth = 1.3 pc
Since 1 pc = 1 parsec = 3.086*10^16 m
So,
time = 1.3*3.086*10^16 m/(17000 m/sec)
time = 2.36*10^12 sec
Now we know that 1 yr = 3.154*10^7 sec
So,
time = 2.36*10^12 sec*(1 yr/(3.154*10^7 sec)) = 74785 yr
Since currently we are in 1977, So the year it will reach Proxima centauri will be = 1977 + 74785 = 76762 yr
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