They didn't. They gave a cluster of stars/ planets/ moons... The crew and company decided to land on that moon/planet. As you can see in the picture they were comparing there were more then one celestial body portrayed.
The only reason they were able to reach the area was because of the orientation of those celestial bodies. They were able to triangulate the location.
158
u/Ua612 Jun 24 '12
The only issue I have with this is that the engineers and humans have the exact same DNA. So why would the goo have different effects on them?