The combined power of a space telescope, a large ground-based telescope and a gravitational lens made catching a small galaxy — 1/100 the mass of the Milky Way — at the cosmic reionization epoch feasible.
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Kashikawa, N. Early Universe: Tiny emissary from afar. Nat Astron 1, 0111 (2017). https://doi.org/10.1038/s41550-017-0111
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DOI: https://doi.org/10.1038/s41550-017-0111