# Is Empty Space Really Empty? A 90-Year-Old Mystery Gets Its Answer (S05E168 — The Weekend Wrap)

Page: https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676/is-empty-space-really-empty-a-90-year-old-mystery-gets-its-answer-s05e168-the-weekend-wrap
Text version: https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676/is-empty-space-really-empty-a-90-year-old-mystery-gets-its-answer-s05e168-the-weekend-wrap.md
Podcast: [Astronomy Daily: Latest Space News](https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676)
Published: 2026-08-15T09:35:18+00:00
Episode link: http://www.astronomydaily.io
Audio file: https://dts.podtrac.com/redirect.mp3/mgln.ai/track/op3.dev/e/api.spreaker.com/download/episode/74046249/is_empty_space_really_empty.mp3
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Duration seconds: 930

## Resource

Today's episode — S05E168, Saturday August 15, 2026, our "Weekend Wrap": **Main story: a magnetar confirms 90-year-old vacuum birefringence prediction.** A team led by Rachael Stewart (George Washington University), using NASA's IXPE spacecraft, found the strongest evidence yet that extreme magnetic fields polarize light passing through empty space — confirming a 1936 prediction by Werner Heisenberg and Hans Euler. The team studied magnetar 1E 1547-5408 and found X-rays nearly 3x more polarized than expected, in a direction matching the star's magnetic field. Published August 5 in *Nature*. **The week in review:** - **Starship:** Ship 40 (Flight 13, splashed down July 24) remains adrift in the Indian Ocean after recovery efforts stalled in rough seas; Elon Musk said August 7 that recovery is "not looking good right now." Still unresolved as of this weekend — roughly 18% recovery odds per prediction markets. SpaceX has moved on to Flight 14 prep (Ship 41, targeting ~August 20). - **Eclipse:** The August 12 total solar eclipse swept a 182-mile shadow from the Arctic through Greenland, Iceland (2m18s max totality at Látrabjarg) and northern Spain. Next Spanish total eclipse: August 2, 2027. - **Black hole star:** JWST's "Mirage or Miracle" survey identified MoM-BH*-1, a gas-shrouded black hole glowing from just 660 million years after the Big Bang — a candidate explanation for how supermassive black holes grow so fast. - **Virgin Galactic:** Commercial flights delayed again, from Q4 2026 to February 2027; Q2 earnings (revenue $1.54M, net loss ~$55.9M) sent shares down further, with heavy cash burn guided for Q3/Q4 and a new shelf filing for capital flexibility. **Links & sources:** - [Space.com — Is empty space really empty? This magnetic star may finally solve a 90-y…

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