Astronomers have found evidence of a planet orbiting a white dwarf star that appears to have formed after the star’s original life ended, according to a new study. The finding, described by researchers as a suspected second-generation planet, is based on an analysis of archived observations and was announced by the Space Telescope Science Institute, which operates the Hubble Space Telescope for NASA.
The research centers on a white dwarf that had been flagged more than a quarter century ago in Hubble data, where an unidentified chemical signature sat dormant until a reexamination identified high amounts of the element niobium, along with other unusual chemical abundances [1].
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