Formation and evolution of the Solar System depletion period that brought the asteroid belt down close to its present mass is thought to have followed when Jupiter and Saturn entered a temporary 2:1 orbital resonance (see below). The inner Solar System's period of giant impacts probably played a role in the Earth acquiring its current water content (~6 kg) from the early asteroid belt. Water is too volatile to have been present at Earth's formation and must have been subsequently delivered from outer, colder parts of the Solar System. The water was probably delivered by planetary embryos and small planetesimals thrown out of the asteroid belt by
Solar hot water in Australia at least one of the following concession cards: Following to the installation, the householder has up to three months to send in the application to receive the rebate if the below criteria is met. The water heating system does not replace existing one: The water heating system does replace existing one: No Rebates other than the Federal Government's are offered by the Tasmanian Government at the moment. Sustainability Victoria’s solar hot water program, sponsored by the Victorian government, offers rebates to householders who have installed a system abides that the following criteria: New houses and buildings can get a rebate