True, but we can only manage 1G for minutes, and even hours is a pretty far off. Without exotic tech like anti-matter or bending space time nothing is particul

True, but we can only manage 1G for minutes, and even hours is a pretty far off. Without exotic tech like anti-matter or bending space time nothing is particularly close to light speed. Even city size laser arrays are targeting 1-3% of light speed .... for a few grams! It's a mind boggling amount of energy to get any decent fraction of the speed of light, even without the relativistic increases in mass.