🚀 Special Relativity Simulator

Calculate relativistic time dilation, length contraction, and kinetic energy via Einstein's Special Relativity equations. Compare spaceship crew time against stationary observer time.

Velocity as fraction of light speed ($v / c$): 0.8660 c (86.60% light speed)

Earth Observer Time ($t$) Years elapsed on Earth

Ship Rest Length ($L_0$) Meters ($m$)

Lorentz Factor ($\gamma$)

2.0000

Ship Traveler Elapsed Time ($t_0$)

5.00 Years

Contracted Length ($L$)

50.00 m

Kinetic Energy / Rest Mass

100.0% of $mc^2$

At this velocity, while an observer on Earth ages 10.0 years, the astronaut aboard the interstellar vessel experiences only 5.0 years (aging 50.0% slower).