von Zahn U, Hunten D M
Institut für Atmosphärenphysik an der Universität Rostock, Kühlungsborn, Germany.
Science. 1996 May 10;272(5263):849-51. doi: 10.1126/science.272.5263.849.
On 7 December 1995, the NASA Galileo probe provided in situ measurements of the helium abundance in the atmosphere of Jupiter. A Jamin interferometer measured the refractive index of the jovian atmosphere in the pressure region from 2 to 14 bars. These measurements indicate that the atmospheric helium mole fraction is 0.136 +/- 0.004. The corresponding helium mass fraction is slightly below the presolar value, which suggests that separation of helium from hydrogen in Jupiter's interior is only in its early stages.
1995年12月7日，美国国家航空航天局（NASA）的伽利略探测器对木星大气层中的氦丰度进行了实地测量。一台雅满干涉仪测量了木星大气层在2至14巴压力区域的折射率。这些测量表明，大气中氦的摩尔分数为0.136±0.004。相应的氦质量分数略低于太阳前的值，这表明木星内部氦与氢的分离仅处于早期阶段。
