Universe Today Podcast [Q&A] Giving Up on Dark Matter, Swarm of Cheap Probes VS Single Expensive One, Rotating Universe
Jun 12, 2025
Is it time to give up on finding dark matter? The discussion explores the intriguing idea of launching a swarm of inexpensive space probes instead of a single costly mission. Plus, the mystery of the universe's potential rotation and its axis captures attention. With questions ranging from gravitational lenses to unique propulsion concepts like air-breathing ion engines, the conversation is packed with cosmic curiosity. And a fun tip on how to inspire a friend to fall in love with astronomy adds a personal touch!
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CubeSats Reduce Mission Risk
- Use CubeSats to test new space technology cheaply and reduce risks for expensive missions.
- Smaller satellites allow more frequent, lower-cost science missions tailored to specific research goals.
No Universal Axis for Rotation
- If the universe rotates, identifying an axis is complex due to lack of universal reference points.
- Rotation concepts depend on perspective; no true center or axis exists in an infinite universe.
Gravitational Lensing Basics
- Gravitational lensing occurs when observer, lens, and background object align with sufficient gravity.
- More massive foreground objects create stronger lensing, enabling observation of distant galaxies and exoplanets.