SpinLaunch, a Silicon Valley startup, announced plans Thursday to launch rockets without spending any money on traditional fuel. : The company will launch rockets with ground-based electricity. It takes an exorbitant amount of energy to lift a rocket from its launchpad. And space exploration companies have continued to rely on fossil fuels, which can cost hundreds of thousands of dollars for a single launch. But SpinLaunch thinks it can spin a rocket at extremely high speeds using electricity and then catapult it to the heavens.