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How did scientists determine SM0313 is the oldest star ever discovered?

User Tabchas
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Answer:

-It was discovered using the ANU skymapper telescope. Scientists found that it is a good 6,000 lightyears away, dating back to the beginning of time.

Step-by-step explanation:

User Astex
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Answer:

The star sm0313, was discovered using the ANU skymapper telescope at the siding spring observatory and later confirmed by the megellan telescope in Chile. Somewhat surprisingly, it's located a "mere" 6,000 thousand light-years away, they origins date back to the beginning of time.

User Dsplatonov
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