Astronomy Daily S05E127 | Monday, June 29, 2026 Hosts: Anna & Avery | astronomydaily.io | @AstroDailyPod In today's episode: RAD-BAARG — The Bow-and-Arrow Galaxy A citizen scientist scanning LOFAR radio telescope data spotted a galaxy like nothing seen in 25 years — RAD-BAARG stretches 1.8 million light-years and shows what may be the clearest radio signature of a giant cosmic bow shock ever observed. Published June 22 in Monthly Notices of the Royal Astronomical Society. Hayabusa2 Flyby — One Week Away Japan's Hayabusa2# spacecraft is set to fly past asteroid Torifune (2001 CC21) on July 5 at a distance of just 1–10 km — one of the closest asteroid encounters ever attempted. The spacecraft already delivered Ryugu samples to Earth in 2020. Mars Magmatic Systems — Oxford/Nature Astronomy A University of Oxford-led study published June 26 in Nature Astronomy reveals seismic evidence that Mars once hosted vast, Earth-like transcrustal magmatic systems spanning potentially thousands of kilometres — without plate tectonics. Based on NASA InSight seismic data. Skywatching — Strawberry Moon & Mercury Retrograde The full Strawberry Moon peaks at 23:58 UTC tonight in Sagittarius near the Teapot asterism. Mercury also begins retrograde motion today. Southern Hemisphere viewers have good conditions for lunar viewing in winter skies. ESA Juice & 3I/ATLAS — Five New Findings ESA has published early results from Juice's November 2025 observations of interstellar comet 3I/ATLAS. Key findings: 2,000 kg of water vapour per second at perihelion; comet behaviour resembling solar system comets; novel trajectory data from NavCam; and confirmation of Juice's instrument readiness for the Jupiter mission. NASA Artemis Audit — $5.9 Billion in Cancelled Contracts A NASA Inspector General memo finds the total value of cancelled Artemis programme hardware contracts reached $5.9 billion, reflecting cost increases and timeline extensions prior to programme restructuring. Artemis III lunar landing remains targeted for 2027.

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