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Old 05-09-2007, 07:52 PM   #16
skan72
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Default Re: another planet like earth found

Anything with mass cannot travel the speed of light, because if an object were to reach the speed of light its momentum is infinite and with the momentum at infinity you need an infinite force to accelerate the object.
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Old 05-09-2007, 07:53 PM   #17
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Default Re: another planet like earth found

Quote:
Originally Posted by skan72
Anything with mass cannot travel the speed of light, because if an object were to reach the speed of light its momentum is infinite and with the momentum at infinity you need an infinite force to accelerate the object.
A+
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Old 05-09-2007, 07:54 PM   #18
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Default Re: another planet like earth found

Quote:
Originally Posted by -primetime-
nope...if it takes 20 years to get there going the speed of light then it would take 40 years to get there going half the speed...simple math

Yeah that was stupid on my part...I wasn't thinking correctly.
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Old 05-09-2007, 07:55 PM   #19
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Default Re: another planet like earth found

Quote:
Originally Posted by skan72
Yeah that was stupid on my part...I wasn't thinking correctly.

I wouldn't say stupid. It sounded pretty smart to me. Maybe to smart for ISH though. :
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Old 05-09-2007, 07:57 PM   #20
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Default Re: another planet like earth found

Well, I just like physics and the sciences...sorry.
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Old 05-09-2007, 08:03 PM   #21
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Default Re: another planet like earth found

The fact that almost as soon as we have built a telescope capable of detecting small, earth-like worlds, one turns up right on our cosmic doorstep, shows that statistically, there are probably billions of earths out there.


Makes you wish people lived to the age of a 800 instead of 80.
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Old 05-09-2007, 08:07 PM   #22
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Default Re: another planet like earth found

Quote:
Originally Posted by skan72
Well, I just like physics and the sciences...sorry.

dont be sorry for that lol. Dont be sorry for something that you are interested in.
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Old 05-09-2007, 08:09 PM   #23
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Originally Posted by The_Masterplan
dont be sorry for that lol. Dont be sorry for something that you are interested in.
what if he was interested in your mother?
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Old 05-09-2007, 08:10 PM   #24
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Default Re: another planet like earth found

Quote:
Originally Posted by skan72
Well, I just like physics and the sciences...sorry.


Nothing wrong with that dude.
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Old 05-09-2007, 09:17 PM   #25
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Default Re: another planet like earth found

Quote:
Originally Posted by -primetime-
now if we could only find a way to travel the spped of ligh I could get there in 20 years....not that bad actually

Quote:
Originally Posted by -primetime-
nope...if it takes 20 years to get there going the speed of light then it would take 40 years to get there going half the speed...simple math
A star being 20 light years away does not mean if you traveled (in a space craft) at the speed of light that it would take you 20 years to get there, nor would it take you 40 years traveling half the speed of light.

As was already mentioned it's impossible to travel at the speed of light. But lets, for examples sake, say you were traveling in a space ship to a star 20 light years away at 99% the speed of light or 0.99c. Then it would only take you approximately 2.8 years to get there. However to an observer on earth, the trip would take about 20 years.

Similarly if you were traveling at half the speed of light or 0.5c then it would take you approximately 36.4 years to complete the trip, but to an observer on earth, it would take 40 years.

Seem strange? Welcome to the marvels of Special Relativity known as length contraction and time dilation.
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Old 05-09-2007, 09:24 PM   #26
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Default Re: another planet like earth found

Quote:
Originally Posted by Jabes
A star being 20 light years away does not mean if you traveled (in a space craft) at the speed of light that it would take you 20 years to get there, nor would it take you 40 years traveling half the speed of light.

.
why is everyone over complicating this...

the star is 20 light years away

that means it takes light 20 years to reach the star

if a ship went the speed of light it would take the same 20 years

if a ship went half the speed of light it would take half the time

simple
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Old 05-09-2007, 09:26 PM   #27
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Default Re: another planet like earth found

Quote:
Originally Posted by Jabes
A star being 20 light years away does not mean if you traveled (in a space craft) at the speed of light that it would take you 20 years to get there, nor would it take you 40 years traveling half the speed of light.

As was already mentioned it's impossible to travel at the speed of light. But lets, for examples sake, say you were traveling in a space ship to a star 20 light years away at 99% the speed of light or 0.99c. Then it would only take you approximately 2.8 years to get there. However to an observer on earth, the trip would take about 20 years.

Similarly if you were traveling at half the speed of light or 0.5c then it would take you approximately 36.4 years to complete the trip, but to an observer on earth, it would take 40 years.

Seem strange? Welcome to the marvels of Special Relativity known as length contraction and time dilation.

I have to just give you props for this. Awesome explanation.

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Old 05-09-2007, 09:31 PM   #28
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Default Re: another planet like earth found

Quote:
Originally Posted by ElPigto
I have to just give you props for this. Awesome explanation.

I am still waiting for an explanation...
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Old 05-09-2007, 09:37 PM   #29
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Default Re: another planet like earth found

Just name the rocketship "bad news" dad always said nothing travels faster than bad news...

Last edited by gts : 05-09-2007 at 09:40 PM.
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Old 05-09-2007, 09:58 PM   #30
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Default Re: another planet like earth found

LoL. Stop thinking that you're smart, throw away your pride, and actually try to learn.

It's not that simple.
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