Ryegrog, on 19 September 2012 - 10:52 AM, said:
Would breaking the sound barrier be different?
To add to what
The Sky Scanner said, breaking the sound barrier was an engineering problem. There were no laws of nature that forbade it. After all bullets had been leaving the end of rifles at supersonic speeds for a considerable time before Chuck Yeager flew the Bell X-1.
The problem with the sound barrier was producing an engine powerful enough and a airframe strong enough. When the technology was ready the sound barrier was broken.
The speed of light is a whole different kettle of fish. If Einstein is right and our current understanding of physics is correct then it is impossible for an object with mass to achieve light speed. No amount of engineering genius can get around that. That is why people are looking for loopholes that will allow interstellar travel without breaking the laws of nature.