It is the best of times , it is the worst of times , for brothers Albert and Henry, identical twin brothers, aged 20. It is the best of times because brother Albert is going to have a inter-star voyage for the first time in human history. That star system Albert about to explore is so similar to our Solar System, there are planets around the star.
Most recent research indicates that one of the planets in the star system is very suitable for life.
It is even possible that Albert will be able to find some kind of highly developed intelligent creatures on it. However, the star's distance from our Solar System is so huge, measured almost 30 light years. Even if Albert's spaceship can travel approaching the speed limit of the Universe, the speed of light , it is going to take several decades for the round trip and back to the earth. The theory of Relativity dictates that nothing travels faster than the speed of light . Unfortunately, Henry can not go with his twin brother Albert since he has other important things to do here at the earth home base.