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| 如果你忘記伊莉的密碼,請在登入時按右邊出現的 '找回密碼'。輸入相關資料後送出,系統就會把密碼寄到你的E-Mail。 RNAVision 發表於 2016-5-13 02:36 AM
即使是相對速度也是過不了光速的。比如A\B兩個人分別以0.6倍光速向相反的方向移動,無論從A看B,還是從B看 ...
Due to the expansion increasing as distances increase, the distance between two remote galaxies can increase at more than 3×10^8 m/s, but this does not imply that the galaxies move faster than the speed of light at their present location (which is forbidden by Lorentz covariance). ... |
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