A mysterious sound heard inside the Boeing starliner capsule has stopped and will not affect its planned return to earth. Here's what astronauts transmitted to mission control that all right. But that one came through. It was kind of like a pulsing noise, almost like a sonar ping. No, Jordan. It's not the little green men up in space. NASA says the pulsing sound was actually feedback from an audio configuration between the international space station and the starliner capsule. The agency confirmed the spacecraft will undock from the ISS as early as Friday. The two starliner astronauts will fly home aboard a SpaceX capsule in February. It's not the little green men yet. Operative word.