# Taking Advantage of Time Dilation

According to Einstein's theory of Special Relativity, one's speed in relation to a relatively stationary object would 'slow down' time on the moving object.

With this in mind, would it be possible to travel in a straight line away from Earth (stationary object) in a space craft able to travel at +90% the speed of light for 2 years and return with significant time dilation?

What technologies have we generated that could reach speeds for significant time dilation (+10 years)?

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@Py-ser: In what sense are you using 'inertia' in your statement? If you're transplanting the Newtonian 'resistance to acceleration', then yes, it is greater, but then it is not a scalar and depends on direction of applied force, from $\gamma m$ to $\gamma^3 m$, and so is not actually the relativistic mass. The relativistic mass is just another name for total energy anyway. –  Stan Liou May 23 at 9:49