Were galaxies much different in the early universe?

January 24, 2023

PANO_20220920_115257 750px The HERA radio telescope consists of 350 dishes pointed upward to detect 21-centimeter emissions from the early universe. It is located in a radio-quiet region of the arid Karoo in South Africa. (Photo credit: Dara Storer, 2022)

An array of 350 radio telescopes in the Karoo desert of South Africa is getting closer to detecting “cosmic dawn” — the era after the Big Bang when stars first ignited and galaxies began to bloom.

Joshua Dillon, a research scientist in the University of California, Berkeley’s Department of Astronomy is lead author on a new paper describing a twofold increase in the sensitivity of  the Hydrogen Epoch of Reionization Array (HERA).

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