BBC: A Japanese spacecraft is due to launch on a mission to help scientists understand and monitor how the Earth’s climate is changing. Gosat is a two-metric-tonne Earth-orbiting satellite which will map the abundance of greenhouse gases in the atmosphere, and where they are. The probe will lift off from the Tanegashima launch site in southern Japan early on Thursday. It will orbit the planet at an altitude of 666km during its five-year mission. Japan’s Space Agency …