世间万物的存在，必定有其存在的价值和意义，每一个事物的产生必定有其产生的根源，并非凭空而降。

Helium 氦

1868年8月18日，在现孟加拉国附近，有一次条件比较好的日全食，法国天文学家让桑在观测日全食的时候，看到日珥光谱里面有一条奇特的黄线。这条黄线跟钠线的位置虽然相似，但不是钠，而是一种未知的元素。

让桑于是写了一封信寄往巴黎科学院，这个信在路上走了两个多月才到达巴黎。无巧不成书，这个时候巴黎科学院收到了另外一封信，是英国天文学家洛克耶寄过去的，也报告了在日全食观测中同样的发现。同样的两封信报道了一样的情况，引起了科学界的高度重视。

科学家们给这种新元素起名为Helium（氦），这个词源自古希腊语太阳，意思是“太阳元素”。

那么He元素就和太阳逃脱不了关系了。

1868, coined from Gk. helios "sun" (see sol), because the element was observed in the solar spectrum during the eclipse of Aug.18,1868, by Eng. Astronomer Sir Joseph N. Lockyer (1836-1920) and Eng. chemist Sir Edward Frankland (1825-99). It was not actually obtained until 1895.

Not surprisingly, considering the central importance of the sun to human life, the word for it in the vast majority of modern European languages goes back to a common Indo-European source – *sāu- or *su-. These variants have however differentiated into several distinct camps. The *sāu- form adopted an -l- suffix, and evolved into Greek hélios (source of English heliotrope), Latin sōl (whence French soleil, Italian sole, and Spanish sol, not to mention English solar, solarium, etc), Welsh haul, and Swedish and Danish sol. The *su-form with an -l- ending has given Russian solnce, Czech slunce, Serbo-Croat sunce, etc. But the modern West Germanic languages have inherited the *su- form with an -n- suffix, giving German sonne, Dutch zon, and English sun.

heli-, helio-

helianthus 向日葵

heliocentric 以太阳为中心的

heliometers 太阳仪

heliosphere 日光层

heliotherapy 日光浴疗法