Today on Astronomy Daily: NASA's Artemis II mission is rolling back to the Vehicle Assembly Building today after a helium flow issue dashed hopes of a March launch. We cover the latest on what went wrong, what it means for the April window, and what happens next. We also have five more stories to get through: Perseverance just gained the ability to locate itself on Mars with GPS-like precision — no Earth assistance required. Scientists have published a daring plan to intercept interstellar comet 3I/ATLAS using a solar slingshot manoeuvre, with a launch in 2035 and a 50-year journey to follow. China's mysterious Shenlong space plane is back in orbit on its fourth mission, and we still know almost nothing about it. We run through this week's packed launch schedule — including Rocket Lab's hypersonic scramjet test flight happening today, and Firefly Aerospace's return to flight on Friday. And we close with a genuinely beautiful piece of science: researchers have used supercomputers to solve a 50-year-old mystery about how elements move inside red giant stars. In This Episode 00:00 — Introduction 01:30 — Story 1: Artemis II rollback — the latest 05:30 — Story 2: Perseverance gets GPS on Mars 09:00 — Story 3: The 50-year mission to chase 3I/ATLAS 12:30 — Story 4: China's Shenlong space plane — Mission 4 15:00 — Story 5: This week's launch schedule 17:30 — Story 6: Supercomputers solve the red giant mystery 19:30 — Outro Find Us Website: astronomydaily.io Social: @AstroDailyPod Network: Bitesz.com Podcast Network

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SpaceTime with Stuart Gary Gary - Series 29 Episode 23

In this episode of SpaceTime, we investigate the discovery of a nearly invisible galaxy dominated by dark matter, the latest delays in the Artemis 2 mission to the Moon, and the anticipated launch of Australia's new hypersonic scramjet.

A Dark Matter Galaxy Unveiled

Astronomers have identified an almost invisible galaxy, catalogued as CDG2, located in the Perseus galaxy cluster approximately 300 million light years away. This galaxy is believed to be composed of about 99% dark matter, making it one of the most dark matter-dominated galaxies ever detected. The findings, published in Astrophysical Research Letters, reveal that dark matter constitutes roughly 80% of the universe's total matter, and CDG2's faint presence was confirmed through observations of its globular clusters using NASA's Hubble Space Telescope and the European Space Agency's Euclid Space Observatory.

Artemis 2 Mission Delayed Again

NASA has announced another delay for the Artemis 2 mission, which aims to return humans to lunar orbit for the first time in over 50 years. A helium leak discovered in the Space Launch System (SLS) rocket's upper stage has prompted the agency to roll back the launch vehicle to the vehicle assembly building for repairs. This setback eliminates the potential for a March launch, with the next available windows opening in early April. The Artemis 2 mission will carry a crew of four on a 10-day journey to the Moon, including critical system tests and satellite deployments.

Australia's Hypersonic Scramjet Launch Imminent

An Australian company is set to test its new hypersonic scramjet-powered aircraft, the Dart AE, before the end of the month. This innovative vehicle will utilize a 3D printed Spartan Scramjet engine, designed to operate at speeds exceeding Mach 5 with liquid hydrogen fuel. The mission, codenamed Cassowary Vex, will launch aboard a Rocket Lab electron rocket and aims to validate the scramjet propulsion system under real hypersonic flight conditions while producing zero carbon emissions.

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✍️ Episode References

Astrophysical Research Letters

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🚀 Astronomy Daily — Season 5 | Monday, February 23, 2026 NASA rolls back the Artemis 2 moon rocket, Europa's ocean gets a life-friendly upgrade, SpaceX breaks its own booster reuse record, Rocket Lab launches a hypersonic mission TODAY, Mars dust storms reveal how the Red Planet lost its water, and SIX planets are visible in tonight's sky. IN THIS EPISODE: 🌕 Artemis 2 rollback — the crew is released from quarantine and the moon launch is pushed to April 🌊 Europa's hidden ocean may be receiving nutrients from the surface — big news for the search for life 🛸 SpaceX flies two Falcon 9s in one day and sets a new booster reuse record 🔥 Rocket Lab's HASTE hypersonic test rocket launches TODAY from Wallops, Virginia 🌪️ A Mars dust storm was moving water at unexpectedly high rates — new clues to the Red Planet's past 🌟 Six-planet parade peaks this week + the crescent Moon passes through the Pleiades tonight FOLLOW ASTRONOMY DAILY: 🌐 astronomydaily.io 📱 @AstroDailyPod on all platforms 🎙️ Part of the Bitesz.com Podcast Network

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