to travell through space? No. But there might be ways to perform a gravitational jump. Einstein made clear that we cannot excellerate past the light of speed, because the weight of the accelerating object would surpass invinite weight, which is impossible in this existance.
Gravity bends light and changes its speed, therefore some astronomic objects visible can be in different real lightyear distance than they appear due to gravital influence on the light send from the object based on the lightstring theory on black holes.
If light being wave and partical can accelerate and slow down by only gravity.....
That would be the Lightspeed Oxymoron ontop of the Wave and Partical Oxymoron.
Which two objects would create a ramp?