Space telescope used to monitor event 1bn light years away that sheds light on how unusual elements are formed
Astronomers have witnessed the creation of rare heavy elements in the aftermath of a violent collision between two neutron stars that were booted out of their home galaxy about 1bn light years away.
The cataclysmic explosion unleashed a burst of gamma rays more than 1m times brighter than the Milky Way and blasted material into space that formed the rare element tellurium and others known as actinides and lanthanides. The more common elements iodine and thorium are also thought to have been forged in the event.
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