We know that space is not only a mere vast vacuum. Interstellar Medium (ISM) is scattered all over the universe. Scientist always wonder how can extrasolar space travel can become possible. Now, let me post a simple question: Is it possible to use the matter (interstellar dust and plasma) or energy (maybe cosmic ray or constant radiation) to power our probes, especially cosmic ray and high energy radiation? If we have an energy magnifier, we can magnify the radiation and boost a lot of energy to power the probe, since we know cosmic rays are harmful to human bodies, there should be a good side to cosmic rays if we master the skills to use handle them well, shouldn`t it? Everything has pros and cons.

Edited June 1, 201411 yr by Nicholas Kang

I believe what you're proposing is currently being developed in the form of solar sails. Also related but more theoretical is propulsion via the Casimir Effect.

I believe what you're proposing is currently being developed in the form of solar sails. Also related but more theoretical is propulsion via the Casimir Effect.

Yes, you are right, Sato. Thanks for reminding me about solar sails and Casimir effect. I didn`t read anything about these inventions before I posed this thread.

There are a few possibilities...

 

http://en.wikipedia.org/wiki/Bussard_ramjet

 

This is interesting but seems even more iffy...

 

http://en.wikipedia.org/wiki/Quantum_vacuum_plasma_thruster

Thanks Moontanman.