天文学家利用 NASA 哈勃望远镜数据破解宇宙悬案 - NASA
Astronomers Solve Cosmic Cold Case with NASA Hubble Data - NASA
以下为原文逐段中文翻译，保留图表与说明。AI 翻译并经 AI 对照复核，仍可能存在错误；核对数据和引用时请同时查看原文。译文发布：2026年10月7日 19:20（北京时间）。
经过细致的调查，天文学家发现了一条出人意料的化学线索，表明白矮星 HS 0209+0832 周围可能有一颗第二代行星运行。这幅于2026年10月5日发布的艺术想象图展示了这种可能的解释。
这颗白矮星是一颗恒星留下的“死亡”核心；那颗恒星耗尽了全部核燃料，并将由气体和尘埃构成的外层包层抛散到太空中。这颗第二代行星由那些被抛出的气体和尘埃形成，因此，它的化学成分与在宿主恒星形成过程中形成的行星大不相同。
进一步了解这项科学发现。
图片署名：NASA, ESA, Leah Hustak (STScI)
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Astronomers Solve Cosmic Cold Case with NASA Hubble Data - NASA
Diligent sleuthing by astronomers uncovered a surprising chemical clue that indicates the white dwarf star HS 0209+0832 may host a second-generation planet. This artist’s concept released on Oct. 5, 2026, depicts that possible explanation.
The white dwarf is the “dead” core of a star that burned through all of its nuclear fuel and lost its outer envelope of gas and dust to space. The second-generation planet formed from that cast-off gas and dust, which is why its chemical content is very different from a planet that formed as its host star was forming.
Learn more about this scientific discovery.
Image credit: NASA, ESA, Leah Hustak (STScI)
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