Cosmic Queries – Planet 9
Aug 4, 2026 · 47m
Summary
Neil deGrasse Tyson and Chuck Nice answer listener questions in this StarTalk Cosmic Queries episode. Topics include the scientific evidence for Planet Nine, Pluto’s demotion to dwarf planet status, and the quantum physics behind semiconductors. They also discuss galaxy shapes, dark matter interactions with black holes, and the odds of being hit by a meteorite.
Topics discussed
Sponsors: Discover Cashback and Rosetta Stone
Introduction and Host Banter
Planet Nine and the Rubin Telescope
Pluto's Demotion and Dwarf Planet Criteria
Sponsors: Kennedy Space Center and Quince
Quantum Physics and Circuit Boards
Galaxy Shapes and Collisions
Learning Astrophysics: Book Recommendations
Dark Matter as Parallel Universe Matter
ISS Deorbit and Future Funding
Sponsors: Land Rover and Capella University
Meteor Strikes and Neil's Near Miss
Black Holes Absorbing Dark Matter
Outro and Final Sponsors
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