Could we ever get home from a super-Earth?
ASTRONOMY
he greater the mass of a planet, the more difficult it becomes to launch a rocket from the surface into space. In practice this means that the payload a rocket can lift into
Green Cycle Could Burn Iron Over And Over Again
1 Iron has the chemical formula Fe and can replace coal in a power plant in the form of a powder made from old scrap metal. The iron powder burns at temperatures of around 1800°C. 2 When something burns, it is fuelled by oxygen (O2 ). The burning of
