Science, Maths & Technology
How long would it take to colonise the galaxy?
...System in a human lifetime. However, with our present technology, or at least the technology that might come in the next century or so, we can imagine an amazing prospect. [Imagined vision of a spaceship passing above a distant planet] Consider a ship that leaves the Earth and takes 90 years to traverse the 10 light-years to a nearby star. The ship departs carrying 1000...