Episode
The Hydrogen Map: How a Radio Telescope Heard Half the Universe
- Published
- Sep 5, 2026
- Duration seconds
- 1658
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Summary
Anna and Avery open the Weekend Wrap with a genuine first: South Africa's MeerKAT has detected the 21-centimetre hydrogen signal from four to five billion light years away using radio data alone — no optical galaxy survey propping it up — proving out the technique the Square Kilometre Array will use to measure dark energy. Then the week in review: Roman's coronagraph wakes up, Starship Flight 14 gets a date, Mars turns out to be lopsided inside, BepiColombo lets go, LZ's one unexplained flash, and a centaur caught in the act of becoming a comet. Plus the sky for the week ahead, both hemispheres. Links & sources · University of Manchester — Astronomers use MeerKAT to directly detect faint hydrogen signal from the distant Universe — https://www.manchester.ac.uk/about/news/astronomers-use-meerkat-to-directly-detect-faint-hydrogen-signal-from-the-distant-universe · The Astrophysical Journal Letters — Paul, Wolz, Santos, Chen et al. (paper DOI) — https://doi.org/10.3847/2041-8213/ae808f · American Astronomical Society — release listing — https://aas.org/node/730547 · Phys.org — MeerKAT directly detects faint hydrogen signal from the distant universe — https://phys.org/news/2026-09-meerkat-faint-hydrogen-distant-universe.html · Space.com — Scientists detect signals of hydrogen from billions of years ago — https://www.space.com/astronomy/galaxies/scientists-detect-signals-of-hydrogen-from-billions-of-years-ago-could-this-help-us-map-out-the-universe · Xinhua — MeerKAT in South Africa directly detects faint hydrogen signal from distant universe — https://english.news.cn/africa/20260905/3f6c7164a4404b0a9b79f879b1d31a59/c.html · SKA Observatory — the construction journey (SKA-Mid, Karoo; SKA-Low, Murchison) — https://www.skao.int/en/explore/construction-journey · NASA Scienc…