Small universe - is there any point in interstellar communication?

Everything on Earth and in the Solar system is as we know it. However it is discovered that we live in a small but unbounded universe. That is to say if we travel far enough in a straight line we will return to Earth.

You may be familiar with the classic Asteroids game that can be played here. If you fly off one side of the screen then you reappear at the other side.

Scientists have discovered that we live in a cube-shaped universe. It is just like Asteroids but in three dimensions.

We know that other versions of Earth (or rather Earth itself) are 1 light year away because we receive radio and TV broadcasts that were transmitted a year ago from the six different directions.

Question

We can see these 'other' worlds tantalisingly close but in fact it's like looking at the back of our own heads.

Is there any use that humanity can find for this phenomenon or is there nothing to gain at all?

What does it mean for science and space-travel?

posted over 8 years ago

chasly from UK‭

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