1868年8月18日：氦元素的发现

在1868年的日全食期间，两位天文学家独立在太阳光谱中发现了一条新的谱线。这一发现揭示了一种当时未知的元素，并被命名为氦。

During the total solar eclipse of Aug. 18, 1868, two astronomers, Pierre Jules César Janssen of France and J. Norman Lockyer of England, each independently discovered a new line in the Sun’s spectrum. Lockyer thought it showed an undiscovered element, which he named helium. (In Greek mythology, Helios was the Sun god.) Although scientists would Continue reading "Aug. 18, 1868: Helium is discovered" The post Aug. 18, 1868: Helium is discovered appeared first on Astronomy Magazine .