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Thanks for the snapshots Hubble

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Old 05-12-2009, 11:52 PM   #1
RobH4413
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Re: Thanks for the snapshots Hubble

If your driving 60mph towards a car that's traveling 60mph, it is like your traveling 120 mph towards the car. With the speed of light, this is not true.

Speed of light is 299,792,458 mps, so if your traveling 60mps towards the speed of light.... the light is still coming at you at a constant 299,792,458 mps.


Nutso.
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Old 05-12-2009, 11:58 PM   #2
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Re: Thanks for the snapshots Hubble

The speed of light is 186,282 miles per SECOND. That means in one second you could travel the circumference of the planet earth (24,901 miles) 7.5 times. In one second. That's crazy.
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Old 05-13-2009, 10:15 AM   #3
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Re: Thanks for the snapshots Hubble

Quote:
Originally Posted by GMScud View Post
The speed of light is 186,282 miles per SECOND. That means in one second you could travel the circumference of the planet earth (24,901 miles) 7.5 times. In one second. That's crazy.
Yeah, and there'd be time dilation, as steveo alluded to. I'm not sure of the math, but imagine orbiting Earth at the speed of light for a few weeks. Years would have passed on Earth, but for you it has only been a few weeks.

This is basically what makes long-distance space travel impractical. If we were able to travel the speed of light, it'd still take a lifetime to reach the nearest galaxy. All the while, time would be passing much quicker on Earth. So, if it takes 75 years at the speed of light to reach Andromeda, thousands of years could be passing on Earth during your voyage. Hell, the human race could become extinct before you even reached your destination. Warp drive is the only way!
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Old 05-13-2009, 10:27 AM   #4
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Re: Thanks for the snapshots Hubble

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Originally Posted by GhettoDogAllStars View Post
Yeah, and there'd be time dilation, as steveo alluded to. I'm not sure of the math, but imagine orbiting Earth at the speed of light for a few weeks. Years would have passed on Earth, but for you it has only been a few weeks.

This is basically what makes long-distance space travel impractical. If we were able to travel the speed of light, it'd still take a lifetime to reach the nearest galaxy. All the while, time would be passing much quicker on Earth. So, if it takes 75 years at the speed of light to reach Andromeda, thousands of years could be passing on Earth during your voyage. Hell, the human race could become extinct before you even reached your destination. Warp drive is the only way!
It's what also makes it highly unlikely that if there were life outside of earth (civilized life) that we could ever communicate with them. Because they're either way way way ahead of us, or us of them.
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