space exploration

does mankind already develop farming in outer space, like planting corn in a space station, with artificial sunlight or something, they can plant cactus for the water-DA...hah what do you think of that, we can explore beyond our own solar system!!!!

There are other solar systems...in other galaxies...

They're solar systems BECAUSE they have a sun. We wouldn't populate a world that was too far away from it's sun, as it wouldn't get enough heat or light.