We Will Retrieve Pioneer 10

Pioneer 10 is the first interstellar spacecraft launched by mankind. It was also the fastest spacecraft launched, to the date of its departure. But it will take eighty thousand years for Pioneer 10 to reach the distance of the nearest star. Because space is so empty, it will never enter another Solar System. The little golden message aboard Pioneer 10 will be read, but only if there are interstellar voyagers able to detect and intercept Pioneer 10. I believe that such an interception may occ...

 Space Exploration Costs the Same as Exploring the World

The Solar System is much vaster than the Earth, but the speeds of our spacecraft are, of course, much greater than the speeds of the sailing ships of the fifteenth and sixteenth centuries. The spacecraft trip from the Earth to the Moon is faster than was the galleon trip from Spain to the Canary Islands. The voyage from Earth to Mars will take as long as did the sailing time from England to North America; the journey from Earth to the moons of Jupiter will require about the same time as did t...

 Space Flight May Mature Us as a Civilization

In all the history of mankind, there will be only one generation that will be first to explore the Solar System, one generation for which, in childhood, the planets are distant and indistinct discs moving through the night sky, and for which, in old age, the planets are places, diverse new worlds in the course of exploration. There will be a time in our future history when the Solar System will be explored and inhabited. To them, and to all who come after us, the present moment will be a piv...