Live MHD drag · quad-layer shield · warp-bubble transit. Presets, history, export.
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The same run, read as time: how the clocks disagree at this speed, what the crossing costs them against us, and how old the light is by the time it reaches you.
Dilation
γ 1.000000
Below relativistic speeds — the clocks differ by 0.72 parts per billion, which is still enough to matter for navigation.
Transit
8.74 yr here
7.57 years aboard at half light — 1.17 years of other people's lives spent on the way.
Light cone
1.282 s one way
384,400 km is 1.282 s one way, 2.564 s there and back. Anything you learn from there is already that old.
Chronos: on ISS-like orbit clocks run 1.0 ppb slow; at half light, Alpha Centauri is 8.74 years here and 7.57 aboard; the moon is 1.28 s of light away.