Frequently Asked Questions
How long would it take to reach the nearest star?
Proxima Centauri is 4.24 ly away. At 0.1c (30,000 km/s) the trip is 42 years; at 0.01c (3000 km/s), 424 years; Voyager-1's speed needs 75,000 years.
Why is there a traveler's time?
Relativity. Moving clocks tick slower (time dilation). A traveler at 0.99c ages 7× more slowly than Earth observers.
Can we exceed light speed?
No - special relativity forbids it. As v approaches c, energy and time dilation both diverge to infinity.
How long to reach other well-known destinations?
At 0.1c (10% of light speed): Alpha Centauri (4.37 ly) takes about 44 years, Sirius (8.6 ly) about 86 years, and the TRAPPIST-1 system (about 40 ly) roughly 400 years. The center of the Milky Way, some 27,000 ly away, would take about 270,000 years. Divide by the speed in fractions of c to scale any of these.
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This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.