Recent content by shawn1990

ok, so i understandthat if i travel near the speed of light for a while and come back on Earth than i would be younger than the rest...but what if i travel x2 c than does it relate to -ve time travel? since length, mass, time are proportional to motion, how does it relate to traveling more than...

since mass, length and time is proportional to motion, does that mean length, mass and time on Earth is different than on say jupiter, pluto?/?...