Astronomers have discovered a "second-generation" planet, a world that formed from the remains of a dying star. The finding, detailed in a new publication in Nature Astronomy, challenges previous assumptions about planetary formation. The planet orbits a white dwarf, the dense remnant of a medium-mass star that has exhausted its nuclear fuel, and is believed to have formed from material ejected during the star's death. The discovery began 25 years ago when astronomers directed the Hubble Space Telescope and other major observatories toward white dwarfs to study what happens to planetary systems when their central star dies. Over two decades, researchers have tracked chemical anomalies in the atmospheres of these white dwarfs. The classical theoretical model suggested that when a star becomes a red giant, it swallows and destroys its inner planets, leaving only those far from the system intact. However, recent analysis of data from Hubble and observations from the exoplanet hunter TESS (NASA) revealed an abnormal chemical signal around the white dwarf HS 0209+0832, located about 790 light-years from Earth. The atmosphere of the white dwarf showed extreme overconcentrations of zinc, copper, and niobium—elements from the star's dying phase. The observed chemical signature did not belong to an ancient rock swallowed by the star but instead indicated a gas giant similar to Jupiter orbiting very closely (4.4 days) around the stellar corpse. Subject to the intense radiation of the white dwarf, the planet's atmosphere slowly evaporates and pollutes the surface of the star. This planet did not form billions of years ago at the same time as its star but was born after. During its red giant phase, the dying star ejected a massive amount of gas and dust. Forming a protoplanetary disk in this situation is not easy, which helps explain why these planets are so rare. A single, isolated star dies and loses mass in a nearly symmetrical manner. To form an accretion disk necessary for the birth of a planet, HS 0209+0832 probably needed a companion star that brought the ejected material into orbit, rather than letting it escape. This discovery is fascinating because it opens new windows to understanding the mechanisms at work when stars are born, die, and planets form. The announcement in 1992 of a pair of planets around a pulsar, the remnants of a star that had exploded, initially struggled to be accepted by the scientific community. However, it was later realized that these planets had been born from the explosion. This 25-year investigation also offers a glimpse into the distant future of our own solar system: in about 5 billion years, when the Sun dies as a white dwarf, the ashes of our star could give birth to an entirely new world.