Interplanetary Travel

The planets are very far away. A spacecraft traveling at 60 mph a typical speed of a car on a highway – would take about 60 years to reach Mars. Fortunately, rockets travel much faster than this.

The Voyager spacecraft sped from the Earth at 32000 MPH. But even at this speed, travel to the planets takes a long time.

The Future space colonies will have to be self – sufficient, growing their own food and recycling the atmosphere as well as plant, animal and human waste.

Such total recycling is very difficult to achieve, especially within the tiny volume of any initial Moon or Mars station. In experiments on Earth, self – contained artificial environments have proved impossible to maintain for any useful period.

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