How do you make an Earth-like planet？ The Harvard-Smithsonian Center for Astrophysics （CfA） astronomers created a recipe for how you could \"bake\" your very own Earth-like model world.

你會如何來制作一顆類地行星？美國哈佛-史密森天體物理中心的天文學(xué)家們制作了一個配方，教你“焙制”個人專屬的類地行星模型。

Blend well in a large bowl， shape into a round ball with your hands and place it neatly in a habitable9） zone area around a young star. Do not over mix. Heat until mixture becomes a white hot glowing ball. Bake for a few million years. Cool until color changes from white to yellow to red and a golden-brown crust10） forms. It should not give off light anymore. Season11） with a dash of water and organic compounds. It will shrink a bit as steam escapes and clouds and oceans form. Stand back and wait a few more million years to see what happens. If you are lucky， a thin frosting12） of life may appear on the surface of your new world.

將上述配料倒入一個大碗攪勻（不要攪拌過頭），然后用手將其捏成一個圓球，干凈利落地將其置于某一年輕恒星附近的宜居區(qū)域。接著將這一混合而成的圓球加熱至白熱發(fā)光狀態(tài)，再烘烤幾百萬年。隨后進(jìn)行冷卻處理，直至球體顏色由白轉(zhuǎn)黃，最后變紅，并形成一層金褐色的外殼，此時球體應(yīng)不再發(fā)光才對。接下來，添加少許水和有機(jī)化合物。隨著蒸汽蒸發(fā)，云層和海洋形成，球體將會略微縮小。此時退到一旁，等待幾百萬年，靜觀其變。幸運的話，在你創(chuàng)造的這個新世界的地表上可能會出現(xiàn)一層稀疏的生命跡象。