Due to time dilation if you could travel the speed of light you would stop time for yourself and travel to a distant future on Earth. It is impossible however to travel the speed of light, it is only theoretically possible to travel close to it.

But even if we were able to travel the speed of light, Keblerbb is 600 light years away. In other words, it would take 600 years to get there traveling at the fastest speed possible. (at the speed we can travel now it would take 23 million years)

The only other "possibility" is time warps but that is only theorectical and not really known to be possible at this moment.

So it's probably never going to happen. We're going to be stuck on Earth for a very long time.

Unless they are able to terraform Mars.