The Dark Matter Hint That Could Rewrite Physics

Space Nuts: Dark matter clues, Saturn’s new decagon, Mars and Titan missions.

Andrew Dunkley and Professor Fred Watson cover a packed astronomy episode that moves from a tentative dark matter signal to a newly spotted ten sided storm pattern on Saturn. They also dig into two upcoming sample return style missions, one to Mars and one to Titan, before finishing with listener questions about Jupiter’s Great Red Spot, solar missions, gravitational waves, and AI in astronomy.

Key topics

In this episode, Andrew and Fred discuss the Lux-Zeppelin underground detector result, where researchers saw a low-energy flash that might be consistent with dark matter, though the signal is still far short of discovery level.

Fred explains why dark matter is inferred from galaxy rotation and gravitational lensing, and why direct detection experiments need to be buried deep underground and shielded from background noise.

The discussion covers Fred’s own migraine aura experience, including the zigzag visual pattern he describes as a brain-based phenomenon that affects both eyes.

In this episode, they celebrate an outback astronomy success story involving Trevor Barry of Broken Hill, whose long-term Saturn observations helped connect amateur and professional work on planetary atmospheres.

Fred explains Saturn’s famous north polar hexagon and the newly reported south polar decagon, noting that the southern feature appears to have formed only since 2023.

They cover China’s Tianwen-3 Mars sample return plans, including the narrowing of candidate landing sites from 86 to 12 and the mission’s focus on clay-rich terrain that may preserve signs of ancient life.

Fred and Andrew also discuss NASA’s Dragonfly mission to Titan, including the chosen region near Selk crater, the expected 3.3-year primary mission, and why Titan’s dense atmosphere makes rotorcraft flight more practical there than on Mars.

Timestamps

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