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大雅科學

回復 #6 酒井明 的帖子

Speeed of light is 3x10^8m/s or 3x10^5km/s

or 1.8 x 10^5 miles/s.

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The nearest star is the Sun.  Which is not that far away.  

But if you mean the closest star other than the Sun, it is Proxima Centauri, the distance is only 4.22 lightyear.

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"What did X come from" is only a scientific question of the inquisitive.  Many scientists are working on it.  Humble and inquisitive are not mutually exclusive.

[ 本帖最後由 dye 於 2007-8-5 18:14 編輯 ]
The speed of light has been in use for some communication devices for sometimes.  If it is discover to have a margin of error of 20%+, it will not only be a scientific breakthrough, many of our devices will have to be re-design.

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Children's mind is known to be inquistive.  Asking questions, any questions what I would expect of a child.
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