The discovery has allowed astronomers for the first time to study the chemistry of the first stars, giving scientists a clearer idea of what the universe was like in its infancy, a news agency reported.

"This is the first time that we've been able to unambiguously say that we've found the chemical fingerprint of a first star," said lead researcher, Stefan Keller of the ANU Research School of Astronomy and Astrophysics.

"This is one of the initial steps in understanding the nature of the oldest stars. This star has enabled us to record the fingerprint of utmost ancient stars, he added.

"The star, which formed shortly after the Big Bang 13.7 billion years ago, was discovered using the ANU SkyMapper telescope at the Siding Spring Observatory.

The observatory focuses on the re-search of ancient stars, as it conducts a five-year project to produce the first digital map of the sky.


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