揭示大自然的规律
-=Astronomy=-
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我的 Blog:
[∑〖数学〗]
[Ω〖物理〗]
[¤〖天文〗]
[℃〖化学〗]
全站 Blog:
光年[Light-Year]
¤〖天文〗
2005-6-20 20:16
The distance traveled in one year by light propagating in a vacuum,
One
parsec
equals 3.26 light-years.
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