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周四为英国物理学家霍金逝世一周年，皇家铸币厂周二发行霍金纪念币，面值50便士。硬币字体模仿传统科幻小说，并配以黑洞图案及理论公式。霍金是继伊利沙伯王太后及战时首相邱吉尔后，第三位去世一年就有纪念币铸造的名人。

纪念币上刻有黑洞、霍金的名字，以及美国物理学家贝肯斯坦与霍金共同提出的黑洞熵公式S = kc?A/4?G。设计师埃里斯表示，想展现霍金生前是如何让难以理解的课题，变得通俗易懂和引人入胜。合金质地纪念币价格为10英镑，最贵的是由纯金打造，价格高达795英镑（约4300令吉）。

皇家铸币厂又公开霍金的女儿露西和儿子蒂莫西一同参观厂房的影片，露西表示，很高兴看到父亲也可跟科学家牛顿和达尔文一样，出现在纪念币上，这对于父亲而言是极大的荣幸。外界又估计，霍金很可能是今夏将发行50英镑纸币上的新面孔。