NASA还宣布,2017年哈勃太空望远镜观测到木星卫星木卫二表面出现了疑似水汽羽状物,并在2016年在同一区域附近再次出现。
Confirming the existence of Europa's plumes would allow researchers to study that moon's chemical makeup without having to dig through miles of icy crust.
确认木卫二存在羽状物后,研究人员不必穿越数英里厚的冰层,就可以对该星球上的化学成分进行分析。
The Cassini and Hubble discoveries related to these "ocean worlds" will help scientists plan NASA's Europa Clipper mission, set to launch in the 2020s. The plan is for the unmanned spacecraft to orbit Jupiter and perform a detailed investigation of Europa, including measuring the depth and salinity of its ocean.
卡西尼号和哈勃望远镜关于“海洋星球”的发现有助于科学家筹备NASA的“木卫二快艇号”任务,该计划将于本世纪20年代启动。该计划是让木卫二快艇号无人航天器绕木星飞行,并对木卫二进行海洋深度、海水盐分浓度测量等详细调查。
"These discoveries are coming just at the perfect time," Jim Green, director of NASA's Planetary Science Division, said Thursday. "It enables us to make the right set of observations that can tell us much more about these ocean worlds, Europa in particular."
NASA行星科学部主任吉姆•格林13日表示:“这些发现来的正是时候。它使我们能够作出正确的观察,可以让我们更了解海洋星球,特别是木卫二。”
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