Voyager is "only" travelling at around 36,000 MPH (give or take a couple of thousand MPH) = about 10 miles per second and in terms of Space Travel, that speed is snail speed!

They've a long way to go to get to 186,000 miles per second and even at that speed, it's too slow.

Our nearest Star neighbour (after the Sun!!) is Proxima Centauri and travelling directly at the speed of light would take us just over 4 years and a month to get there.

After the other two Stars in Centauri (A & B), the next nearest Star would take us 6 years to get there travelling at the speed of light.

Sooooo, currently, we can't travel fast enough to get anywhere in Space and I think that looking back in time to "see" Stars & etc that are no longer there (because the died or went Super Nova long ago) is really a waste of effort, time and money and "they" should concentrate on Star systems much closer to us looking for Stars with Planets in the Habitable Zone. Then concentrate on propulsion systems and protection systems for the spacecraft.

In the end, they might discover that a bit of Sci-Fi was right, it's only micro sized craft and beings which will be capable of inter-stellar travel.