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How can can we see supernovae farther back in time than their parent galaxies?

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How can can we see supernovae farther back in time than their parent galaxies?

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We cannot: the earliest galaxies have a lookback time of about 12-13 billion years, or 1-2 billion years after the Big Bang. The farthest supernovae have a lookback time of 8-9 billion years, or 5-6 billion years after the Big Bang.

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