>>213765705
Ever since after the second alien movie, they've discarded the idea that space travel or communications takes a while. Even if they still use hypersleep, they can still fly to other planets pretty quickly for no reason. The idea here was that a solar flare damaged their ship and killed a lot of the crew, so they wanted to take a breather before getting back in, since there really was no rush. In the meantime, they detected an intelligent signal from that planet, and not only that, but it was human music, so yeah, they had a responsibility to at least investigate. What they could have found was something as simple as a ship crashed a few years ago and they rescue the survivor, then move on. No reason to suspect there were aliens and certainly not an insane Earth Android that wanted to kill them all with his personal alien monsters. Since they also made shuttle landings trivial, there's no reason not to take a slight detour to investigate, fly down for a day or two, then continue on your journey to the colony and have a report to tell.