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A light-year is a measure of distance, not time.

Can a human survive long enough to travel that distance? Not by any means known.

The fastest spacecraft ever built by humans (Voyager 1) is traveling at 17.23 km/s.

Light travels at 299,792 km/s. That means that a spacecraft would take over 17 thousand years to travel one light-year.

Incidentally, the nearest star which might have planets is over 10 light-years away.

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14y ago
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5mo ago

Yes, light years are a unit of distance used to measure the vast distances between objects in space, particularly in astronomy. One light year is the distance that light travels in one year, which is about 9.46 trillion kilometers.

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14y ago

To travel a light-year in a decade would mean travelling at 1/10 the speed of light [if you disregard time needed for acceleration and deceleration. See discussion]. Current technology is nowhere near achieving this speed; while there are some speculations about future technology, for now, this is just that: speculation. It is hard to tell whether it will be possible in the foreseeable future.

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14y ago

Yes. A light year is the distance light travels in one year and is a measure of distance or length. It equates to about 6 trillion miles.

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