Add Yahoo as a preferred source to see more of our stories on Google. Brown dwarfs are stellar misfits — too massive to be planets, too lightweight for nuclear fusion. If Nemesis exists, it’s ...

Back in 2022, astronomers were puzzled by a so-called “tidal disruption event” (TDE), dubbed AT2018hyz, that had faded when it was first noticed three years earlier, only to unexpectedly reanimate and ...