Though deep space exploration promises to solve many mysteries that are beyond our solar system, entry into other regions of the galaxy and return will depend on development of light-speed travel. According to professor and head of Florida Institute of Technology’s Aerospace and Space Science Dept., travel at the speed of light is currently out of the question. The only objects that can travel at that speed are light packets and photons. When objects with mass accelerate to high speeds and reach ten thousand kilometers every second they have to leave behind Newton’s philosophy and general relativity theory of Albert Einstein together which is not physically possible.
Travel to deep space led by humans using contemporary technology will take more time than the lifetime of space travelers. This is why discussions about deep sea travel circles back to moving at the speed of light and two undeniable answers. First is that till date no human has made a vehicle that can travel at the speed of light and secondly scientists cannot predict the biological dangers of traveling into deep space at that speed. So sending humans into deep space is difficult as of now until humans can develop a real life equivalent of Millennium Falcon – the fictional deep space vehicle used in Star Wars series.
According to associate professor of Physics at Fordham University, right now we are limited by laws of physics but beyond our knowledge there could be new laws of physics that have not yet been discovered. Crossing expansive interstellar distances requires manipulation of space-time or developing a system wherein one can fold distances and jump from one destination to another instead of accelerating speed to move across distances at superluminal speeds. He explained that the distance between stars and galaxies are so fast that even vehicles moving at ten times the speed of light would require minimum 10,000 years to move from one end of Milky Way to another.