By chance, astronomers saw the old cosmic interloper in a region of star formation located over 2,000 light-years away.
process in their outer layers. The sun will go through this stage of stellar evolution in around 5 billion years, forming a star similar to the cosmic gatecrasher the team found in NGC2264.
"This means that some process delivered aluminium-26 and iron-60 to our solar system as it was forming," Parker said. "It was thought that the only plausible origin of these radioactive elements was from the supernovae of massive stars that formed in the same stellar groups as stars like our sun," Parker said."The discovery of an AGB star in a star-forming region throws the debate wide open on the origin of these chemical elements. If the 26-Aluminium and 60-Iron instead come from AGB stars, this then removes the problem of the massive stars' destructive radiation.
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