Mercury (planet) 2015. The "BepiColombo" spacecraft will arrive at Mercury in 2025. Mercury appears to have a solid silicate crust and mantle overlying a solid, iron sulfide outer core layer, a deeper liquid core layer, and possibly a solid inner core. Mercury is one of four terrestrial planets in the Solar System, and is a rocky body like Earth. It is the smallest planet in the Solar System, with an equatorial radius of . Mercury is also smaller—albeit more massive—than the largest natural satellites in the Solar System, Ganymede and Titan. Mercury consists of approximately 70% metallic and 30% silicate material. Mercury's
Solar hot water in Australia by selling the RECs their system is eligible. The Commonwealth government is also offering a $1000 rebate to the replacement of electric water heating. Residential and community buildings: Commercial buildings: By installing an environmentally friendly, gas-boosted solar water heater that replaces a previous water electric heating system, you are eligible of the Government of Western Australia’s rebate Solar hot water in Australia Solar hot water is water heated using only natural energy from the sun. Solar energy heats up large panels called thermal collectors commonly known as solar panels. The energy is transferred through a fluid (often water) to a