Quote by Wilson Greatbatch
Rocket scientists agree that we have about reached the limit of our ability to travel in space using chemical rockets. To achieve anything near the speed of light we will need a new energy source and a new propellant. Nuclear fission is not an option.
Summary
This quote highlights the perspective of rocket scientists on the limitations of current space travel technology. According to them, chemical rockets, which have been the primary propulsion method thus far, are reaching their maximum capability. To enable interstellar travel or achieve speeds near that of light, the quote suggests the need for both a new energy source and a new type of propellant. It also dismisses nuclear fission as a viable option for this purpose, leaving room for further exploration and development of alternative solutions.