A spacecraft approaching Earth very quickly is observed at a distance of This has never happened before, so you check your instruments for time and then you check the position of the craft again.
Now you can see it at a distance of where is the speed of light.
The craft is traveling at a constant speed of directly toward Earth. What is
Assume you have made your measurements from an inertial frame very close to Earth.
Hint: The correct solution requires no transformation.