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The speed at which you travel has a direct bearing on the time required.

Ignoring relativistic effects, estimates of the solution may be derived by direct application of the Newtonian laws
of motion, somewhat as follows, to wit:

Speed . . . . . . . . . . . . . . Time required to travel 4 light-hours

c (light speed) . . . . . . . . . 4 hours

0.001c (300,000 m/s). . . . 40 hours

0.000001c (300 m/s) . . . . 400 hours

60 mph. . . . . . . . . . . . . . . 5,100 years

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14y ago
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14y ago

The unit of distance called "light year" is equal to about 9.46 x 105 m, and is, according to its name, the distance covered by the light during a period of one Earth year. Therefore, it would take 4 years to travel 4 light years, or about 1461 days.

According to who - the person travelling or some one just watching from a fixed point. For the person travelling - no time elapses, as they are travelling at the speed of light.

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15y ago

Tricky one :-) 45 Billion years.

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Q: If traveling at the speed of light how long would it take to travel 4 light years?
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