哈勃太空望远镜的历史观测数据显示，白矮星HS 0209+0832周围存在异常高浓度的铌元素，表明该恒星死亡后可能形成了一颗气态巨行星1。这一发现由英国沃威克大学的Jamie Williams等研究团队报告，发表于2026年10月5日的《自然天文学》杂志1。
这颗候选行星的大小约为木星，距离白矮星约370万英里（600万公里）1。研究人员通过分析1999年的哈勃观测档案、FUSE卫星数据和TESS四个月的监测数据得出这一结论，其中TESS的监测发现了该白矮星的周期性亮度变化1。该候选行星目前正在快速失去大气1。研究团队计划在未来数年继续使用哈勃望远镜进行观测，进一步验证这一发现1。
Researchers analyzing archival data from the Hubble Space Telescope have identified evidence suggesting that a gas giant may have formed around the white dwarf star HS 0209+0832 after the star's death.1 The discovery was made by examining abnormally high concentrations of niobium detected in the stellar atmosphere, which points to the possible existence of a second-generation planet in this system.1
The candidate planet is estimated to be approximately the size of Jupiter and orbits at a distance of about 3.7 million miles from the white dwarf.1 The research team compiled data from Hubble's archival observations dating to 1999, measurements from the FUSE satellite, and four months of monitoring by the TESS space telescope, during which periodic brightness variations were detected.1 The planet appears to be losing its atmosphere rapidly.1 Led by Jamie Williams from the University of Warwick in the United Kingdom, the team published their findings in Nature Astronomy on October 5, 2026.1 The researchers plan to continue observing the white dwarf system with the Hubble Space Telescope over the coming years.1
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