Pulsar navigation may not be the stuff of science fiction for much longer. Likely the best way to navigate interstellar distances, NASA is developing the technology much closer to home.
Specifically, they've used pulsar navigation to mark the position of the ISS to within 4.3 miles, which is not bad for space.
Currently, the point is to save money on space probes by avoiding fuel-intensive flybys needed with current navigational systems.
In the long term...
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