Once a decade nuclear power would be transported to the device and power it, whitch also means that. It might  have a live camera so people can look at earth and space. Or instead of nuclear power maybe solar panels facing the sun as an alternative to nuclear power. Along with power we need plasma so the machine doesn’t freeze, so I suggest that we put a plasma generator on top so there is a pipe connecting the plasma generator to the actual plasma saving earth from incoming asteroids. My intention is that the plasma shield melts/burns the incoming asteroid before it enters earth’s atmosphere or hits earth.