Every 7.9 minutes a radio pulse arrives from Canis Major. This week astronomers at ICRAR-Curtin in Perth traced it to a white dwarf orbiting a star like our Sun, the first pairing of its kind, and found that the pulses carry the weather of the companion star with them. We unpack how the timing gives away which star is talking, and everything this result is not. Then: how the LISA gravitational-wave observatory could find planets around pairs of white dwarfs. In The Week That Was: NASA's nuclear Moon rover built from Curiosity's twin, the hot Jupiter that stopped transiting, Euclid's first big data release, and Starship Flight 15, in orbit with its catch attempt still to come at the time of recording. Plus Mars and Jupiter 1.2 degrees apart, and the Leonids, from both hemispheres. In this episode · Lead: GPM J071507−114153, a long-period radio transient made of a white dwarf and a Sun-like star (McSweeney, Hurley-Walker et al., Nature Astronomy, 12 Nov 2026). · Fresh item: LISA as a planet finder around double white dwarfs (McGrath et al., two papers in The Astrophysical Journal, 10 Nov 2026). · Week That Was: PROMISE nuclear Moon rover, gravitational reconnection, Tiangong 9.7 pK condensate (E226); TOI-2535 b, ice-giant dynamos, MeerKLASS (E227); Euclid DR1-Foundation, ASTRA in-orbit assembly (E228). · Starship Flight 15: launched 13 Nov, booster catch aborted, ship in orbit; ship catch attempt still to come at time of recording. Full coverage Monday. · Arc updates: ESCAPADE en route to Mars; Voyager 1 one light-day (18 Nov); BepiColombo (21 Nov); Hera (25 Nov). · Skywatch: Mars–Jupiter conjunction 16 Nov; Leonids 17–18 Nov; where to find Canis Major; ISO 12312-2 eye safety. Sources · Nature Astronomy, DOI 10.1038/s41550-026-03016-z — 'A long-period transient with a Sun-like companion' — nature.com/articles/s41550-026-03016-z · ICRAR / Curtin University release, 12–13 Nov 2026 — icrar.org · NASA Goddard, 10 Nov 2026 — 'NASA Scientists Show How Gravitational Waves Can Reveal New Worlds' — science.nasa.gov · NASA Science, 9 Nov 2026 — 'NASA's ESCAPADE Completes Powered Earth Flybys, Now En Route to Mars' · Space.com Starship Flight 15 live updates, 13–14 Nov 2026; PBS NewsHour / AP, 13 Nov 2026 · Skywatch figures computed in session with PyEphem astronomydaily.io · @AstroDailyPod · Bitesz.com Podcast Network
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