Artemis, Pulsars, Big Crunch & City Killers

S05E43 | February 19, 2026 🚀 Artemis Fuels Up LIVE | Pulsar at Our Galaxy's Heart | Universe's Fate Revealed | City Killer Asteroids | Mercury Tonight! It's a big one today — and we mean that literally. As we record, NASA is fuelling its Artemis II Space Launch System rocket at Kennedy Space Center in a make-or-break second wet dress rehearsal. But that's just the start. We've also got a cosmic discovery that could let us test Einstein's theories like never before, new data suggesting the universe will end in a 'Big Crunch', a sobering warning about thousands of undetected city-killing asteroids, a perfect night to spot Mercury, and a music video filmed in orbit. Welcome to Astronomy Daily.   IN THIS EPISODE: •     🚀 Artemis II Wet Dress Rehearsal: NASA loads 700,000+ gallons of cryogenic propellant in its second fuelling test — critical step toward a March 6 crewed launch around the Moon •     🌌 Pulsar Near Sagittarius A*: Columbia University & Breakthrough Listen detect a candidate millisecond pulsar spinning at 8.19ms next to our galaxy's supermassive black hole — a potential new test of General Relativity •     💥 Big Crunch Theory: Cornell physicist Henry Tye uses fresh DESI and DES dark energy data to calculate the universe has a ~33 billion year total lifespan — challenging the 'Big Freeze' consensus •     ☄️ City Killer Asteroids: NASA's Planetary Defense Officer warns 25,000 mid-sized asteroids capable of devastating cities orbit near Earth — and we've only found 40% of them •     🔭 Mercury Tonight: The innermost planet reaches greatest eastern elongation — your best evening viewing chance of 2026. Look west after sunset! •     🎵 Space Music Video: China's Shenzhou 21 crew celebrate the Year of the Horse with a music video filmed aboard Tiangong Space Station   Follow NASA's Artemis II live stream at nasa.gov | Follow us @AstroDailyPod

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