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UK and US scientists have found the remnants of a star that exploded more than 13 billion years ago.
It would most probably have been one of the very first stars to shine in the Universe, they say.All that is left of this pioneer is the gas cloud it threw out into space when it blew itself apart.
It was identified when its contents were illuminated by the brilliant light coming from the surroundings of a distant black hole.
The cloud's atoms occur in abundances that are quite unlike that found in the nearby cosmos today and are more what one would expect from stars that were originally made only of hydrogen and helium.
The research required the observations of two of the world's most powerful telescopes - the Keck facility in Hawaii and the Very Large Telescope in Chile.
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