It's a heavy element produced in thermonuclear explosions of supernovae. 這是一個(gè)重元素,產(chǎn)生于超新星的熱核爆炸。
Petitjean and Scannapieco are working together on the clustering of heavy elements observed in quasar spectra. 佩提特金與史坎納皮科正合作探討類(lèi)星體光譜中觀(guān)測到的重元素群集現象。