The interstellar travels of Voyager I and II were only possible due to a specific planetary alignment that only occurs every 175 years. The position of the 4 outer planets enabled a slingshot move which greatly increased the crafts speed.
fact
fact
The interstellar travels of Voyager I and II were only possible due to a specific planetary alignment that only occurs every 175 years. The position of the 4 outer planets enabled a slingshot move which greatly increased the crafts speed.