Dr Karl Podcast Super voids, satellite noise and asteroid navigation
Mar 12, 2026
Dr Laura Driessen, astronomer who studies radio transients and cosmic structure. She discusses mysterious slow radio flashes and possible white dwarf origins. They explore supervoids and how multiwavelength maps reveal empty cosmic regions. Conversation covers satellite radio interference and techniques to mitigate it, plus how spacecraft safely cross the sparse asteroid belt.
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Mystery of Slow Spinning Radio Flashes
- Long period radio transients are flashes like pulsars but with minutes-to-hours rotation periods that physics predicts should have switched off.
- Dr Laura is investigating small, coherent radio sources, possibly from white dwarfs, that act like space lasers.
How Supervoids Are Detected
- Supervoids are under-dense regions revealed by mapping galaxy distributions at the largest scales.
- Dr Laura Driessen explains we build cosmic web maps from many wavelengths to show where matter is missing across hundreds of millions of light years.
Daily Mindfulness For Better Brain Health
- Practice short mindfulness routines regularly to reduce stress and improve working memory and emotional flexibility.
- Dr Karl recommends simple daily habits like brief meditation that quiet the brain's default network for measurable benefits.