**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-year-old mystery](https://www.space.com/astronomy/stars/is-empty-space-really-empty-this-magnetic-star-may-finally-solve-a-90-year-old-mystery)
- [Space.com — 'Not looking good right now': Starship likely to be lost at sea](https://www.space.com/space-exploration/launches-spacecraft/not-looking-good-right-now-starship-likely-to-be-lost-at-sea-2-weeks-after-epic-13th-test-flight-elon-musk-says)
- [NASASpaceFlight.com — While SpaceX recovers Ship 40, Ship 41 prepares for testing ahead of Flight 14](https://www.nasaspaceflight.com/2026/08/spacex-recovers-ship-40-ship-41-flight-14/)
- [Manifold Markets — Will Starship Ship 40 be recovered to shore?](https://manifold.markets/Mqrius/will-starship-ship-40-be-recovered)
- [Space.com — Total solar eclipse 2026 thrills millions](https://www.space.com/stargazing/solar-eclipses/total-solar-eclipse-2026-thrills-millions-with-a-stunning-cosmic-spectacle-photos-video)
- [Wikipedia — Solar eclipse of August 12, 2026](https://en.wikipedia.org/wiki/Solar_eclipse_of_August_12,_2026)
- [EurekAlert — Mirage or miracle? JWST finds earliest known 'black hole star' at cosmic dawn](https://www.eurekalert.org/news-releases/1139484)
- [SpaceNews — Virgin Galactic delays resumption of commercial flights to 2027](https://spacenews.com/virgin-galactic-delays-resumption-of-commercial-flights-to-2027/)
- [Virgin Galactic — Q2 2026 financial results and business update](https://www.virgingalactic.com/news/virgin-galactic-announces-second-quarter-2026-financial-results-and-provides-business-update)
- [StocksToTrade — Virgin Galactic (SPCE) news, Aug 13 2026](https://stockstotrade.com/news/virgin-galactic-holdings-inc-spce-news-2026_08_13/)
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