Gold From a Galactic Collision — Neutron Star Crash Stuns Astronomers | Astronomy Daily S05E60

Welcome to Episode 60 of Astronomy Daily Season Five! In today's episode, Anna and Avery cover six major stories from the world of space and astronomy — including a neutron star collision in an unprecedented location, the latest Artemis II news, and a cosmic mystery solved after decades. Stories covered in this episode: 1. NASA Discovers Neutron Star Crash in Unexpected Location A fleet of NASA telescopes — including Chandra, Fermi, Swift, and Hubble — has detected a neutron star merger inside a tiny galaxy buried in a vast stream of gas, 4.7 billion light-years away. It's the first time this type of collision has been spotted in such an environment, and it may explain why gamma-ray bursts sometimes appear outside any galaxy — and how precious metals like gold and platinum ended up in distant stellar regions. Published in The Astrophysical Journal Letters. 2. Artemis II Flight Readiness Review NASA will host a Flight Readiness Review press conference on Thursday 12 March at Kennedy Space Center, covering progress toward the first crewed Artemis mission. The rocket is currently back in the Vehicle Assembly Building following a helium issue, with rollout to the launchpad expected around 19 March and a launch target of no earlier than 1 April 2026. 3. Firefly Alpha 'Stairway to Seven' Scrubbed Again Firefly Aerospace's Alpha rocket — attempting its return to flight after a 10-month grounding — has been scrubbed three times in 10 days. The latest scrub occurred on 10 March during fluid loading after off-nominal readings. A new launch date will be confirmed following engineering review. This mission is the final Block I Alpha flight, with the upgraded Block II debuting on Flight 8. 4. DART Mission Reveals 'Cosmic Snowball Fight' Between Asteroids Researchers at the University of Maryland have found the first direct visual proof of material transfer between two asteroids — fan-shaped streaks on the surface of asteroid moon Dimorphos, left by debris thrown off its parent asteroid Didymos at just 30.7 cm/s. The discovery provides visual confirmation of the YORP effect and has implications for planetary defence modelling. ESA's Hera mission arrives at Didymos in December 2026. Published in The Planetary Science Journal. 5. Starship Flight 12 — About Four Weeks Away SpaceX is approximately four weeks from the launch of Starship Flight 12, which will be the first flight of the upgraded V3 configuration — the most powerful version of the already record-breaking vehicle. Engineers have completed propellant system tests on Ship 39 at Starbase, Texas, and preflight preparations are continuing. 6. Giant Cosmic Sheet Discovered Around the Milky Way Astronomers from the University of Groningen, publishing in Nature Astronomy, have used advanced computer simulations to discover that the matter surrounding our Local Group is arranged in a vast, flat sheet — dominated by dark matter — stretching tens of millions of light-years across. This structure, flanked by enormous empty voids, explains why nearby galaxies are moving away from us rather than being pulled inward. It's the first detailed map of dark matter distribution in our cosmic neighbourhood.
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