Suspected Second-generation Planet Solves NASA Hubble Cold Case

https://science.nasa.gov/missions/hubble/suspected-second-generation-planet-solves-nasa-hubble-cold-case/?utm_source=newsletter&utm_medium=email&utm_campaign=nn202640 Astronomers have solved a decades-old mystery hidden in the data archives of NASA’s Hubble Space Telescope, uncovering a chemical clue that suggests the white dwarf star HS 0209+0832 may host a second-generation planet.