If Moses had launched the Lost Tribe of Israel into space at Apollo speeds, they would be a quarter of a light year away today. They would still need another eighty thousand years to reach our nearest neighbor star.
If Moses could have launched them ten times as fast, they would be over half way there by now. Traveling a hundred times as fast as Apollo, the nearest star is still a millennium away. What if aliens from there tried to come here? A lot can go wrong in a thousand years.
An interstellar probe decelerates into earth orbit. Nothing happens. An astronaut team discovers why. Its crew died in transit. Exposed to whatever killed the aliens, can NASA let the explorers come home? Quarantined and running out of air, how can they survive?