2nd-generation planet: Was this world born around a dead star?
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Artist’s concept of the possible 2nd-generation planet around the white dwarf star HS 0209+0832. If confirmed, the discovery could help solve a “cold case” mystery about the white dwarf. Image via NASA/ ESA/ Leah Hustak (STScI).
Planets form in the disks of dust and gas around newborn stars. These are called 1st-generation planets. But there are 2nd-generation planets too. A 2nd-generation planet can form in the material cast off from dead white dwarf stars.
Astronomers mig
Planets form in the disks of dust and gas around newborn stars. These are called 1st-generation planets. But there are 2nd-generation planets too. A 2nd-generation planet can form in the material cast off from dead white dwarf stars.
Astronomers mig
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