Show notes
A hot Jupiter called TOI-2535 b has become the first planet around a single star seen to stop transiting, tipped out of line by an unseen neighbour. Plus: why Uranus and Neptune have scrambled magnetic fields, MeerKAT measuring how cosmic hydrogen clusters, Euclid's first big data release, ESCAPADE heading for Mars, Starship Flight 15's double-catch attempt, the 2026 ozone hole, and a both-hemispheres sky with Mars and Jupiter 1.2 degrees apart. The planet that stopped transiting. TOI-2535 b, an 8.24-day hot Jupiter ~1,000 light-years away, ran up to ~6 hours early or late and its transits shortened and faded over seven years of TESS data until they vanished in 2026. A hidden companion of at least Saturn mass, likely in resonance on a tilted orbit, is making both orbits precess. Transits should return in 30–50 years. Yee, Petigura et al., The Astrophysical Journal Letters, 9 Nov 2026. Ice giants' scrambled magnetic fields. Dynamo models with electrical conductivity rising with depth reproduce Uranus- and Neptune-like fields, and suggest their tilt could shift by tens of degrees within decades. Aurora observations could test for change since Voyager 2. Yan et al., Communications Physics. MeerKLASS hears the cosmic web. Running MeerKAT's 64 dishes as independent telescopes, the MeerKLASS collaboration detected the 21-cm hydrogen power spectrum on cosmological scales at z = 0.42 over ~236 square degrees, signal-to-noise 6.2. MNRAS. Euclid DR1-Foundation. ~1,900 square degrees (about 1,400 in the southern sky), ~1.8 PB of images, catalogues and spectra. Weak-lensing and clustering products follow in mid-2027. Quick hits. ESCAPADE Blue and Gold complete powered Earth flybys, Mars arrival Sept 2027; Starship Flight 15 targeted NET 13 Nov 22:45 UTC; 2026 Antarctic ozone hole seventh largest in 48 years, recovery on track. Skywatch. Mars–Jupiter 1.19° on 16 Nov (pre-dawn, north-favoured); Venus 1.2° from Spica, a 10%-lit crescent; Saturn high in southern evenings; Leonids peak 17–18 Nov; first quarter 17 Nov, full Moon 24 Nov. Sources · UCLA Newsroom — First known 'disappearing planet' — https://newsroom.ucla.edu/releases/first-known-disappearing-planet-neighbor-wobble-like-top · Yee et al., ApJL 1011 L60 — https://iopscience.iop.org/article/10.3847/2041-8213/aeb4a4 · arXiv 2611.13343 — https://arxiv.org/abs/2611.13343 · Yan et al., Communications Physics — https://www.nature.com/articles/s42005-026-02841-y · UT Austin Jackson School release — https://www.jsg.utexas.edu/news/2026/11/wacky-magnetic-fields-of-ice-giants-explained/ · University of Portsmouth — MeerKLASS — https://www.port.ac.uk/news-events-and-blogs/news/breakthrough-cosmic-hydrogen-measurement-could-transform-our-view-of-the-universe · MNRAS stag1911 (DOI) — https://doi.org/10.1093/mnras/stag1911 · Caltech/IPAC — Euclid DR1 — https://euclid.caltech.edu/page/euclid-dr1 · ESA — DR1 timeline — https://www.cosmos.esa.int/web/euclid/dr1-timeline · Berkeley News — ESCAPADE — http://news.berkeley.edu/2026/11/09/berkeleys-escapade-spacecraft-say-goodbye-to-earth-next-stop-mars/ · NextSpaceflight — Starship Flight 15 — https://nextspaceflight.com/launches/details/8403/
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