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♪
Narrator: Near light speed 101:
Effects of near-light-speed travel.

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First, a lot of weird things can happen,
like time and space getting all bent out of shape.

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For example, If you’re moving at nearly the speed of light,

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according to the clock inside your rocket, you’ll only take
a bit more than half the time to reach your destination

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compared to what a clock on your planet would say.

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The end result is that while your clock might move normally to you, 

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you’d see the clocks back home had moved further when you return,


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so you might want to reschedule your dental appointments
before you leave.

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Also, because you’re going so fast, 

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what would otherwise be just a few hydrogen atoms
that you’d run into quickly becomes a LOT of dangerous particles, 

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so you should probably have shields that keep them from frying
your ship and also likely you. 

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And finally, you wouldn’t want to accelerate too quickly toward
the speed of light, because, well.

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Thanks for watching, and please...
be careful out there.

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(silence)
ON-SCREEN: EXPLORE SOLAR SYSTEM & BEYOND

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ON-SCREEN: NASA logo