Journey to Mars
This requires large rockets, tonnes of fuel, and complex orbital maneuvering. | To overcome the pull of gravity and reach another body in space you need to achieve a certain speed. | A journey to Mars from Earth's surface requires a minimum total speed of nearly 30,000mph. | This is roughly one-third of that necessary to reach the International Space Station from Earth. | Due to the moon's weaker gravitational field, the same journey from the lunar surface would "only" require a speed of 6,500mph (2.9km/s).
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