A planet must be in the goldylocks zone if life is to start. But in that zone the space around the earth has a WEATHER produced by the sun that is very unhospitable to life and inanimate electronics. On Earth we are protected by ozone layer, the atmosphere itself and the magnetic field around the Earth caused by the nickel-iron core of the Earth, liquid and sloshing around inside. Everything must be perfectly tuned.-http://physicsworld.com/cws/article/indepth/44191