Astronomers have found a stream of stars circling the Milky Way, like an elongated clump of cars moving together on circular racetrack. Many such streams have been found before, but this one is different: The stars in it are very old. Very. So old — 11.2 billion years — that they may have been the sole survivors from a lost generation of star clusters that once orbited our galaxy, but have long since been torn apart by it.
Ironically, the name of this structure is the Phoenix star stream. Not because it rose from the ashes of that long-ago population, but because it’s in the constellation of the Phoenix. Still: fitting.
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