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Ziang
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Astronomers said a star named DES16C2nm exploded 10.5 billion years ago.
https://phys.org/news/2018-02-astronomers-reveal-secrets-distant-supernova.html
Do they also mean that at the time the event happened, the star was 10.5 billion light-years away from Earth?
https://phys.org/news/2018-02-astronomers-reveal-secrets-distant-supernova.html
Do they also mean that at the time the event happened, the star was 10.5 billion light-years away from Earth?