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Space Nuts: Fast-Moving Planets, Photon Pressure, and the Nature of Moons
In this engaging Q&A episode of Space Nuts , hosts Andrew Dunkley and Professor Fred Watson tackle a series of intriguing listener questions. Kicking off with Ron's query about the implications of living on a super fast-moving planet orbiting Sagittarius A*, they delve into the fascinating world of time dilation and its effects on scientific observations. Next, Jeff from Colorado poses a thought-provoking question regarding photon pressure and its potential influence on the universe's expansion, leading to a discussion on dark energy and cosmic mysteries. Brian from the Gold Coast wonders about the visibility of cosmic microwave background radiation behind black holes, while Bob rounds off the episode with a query on the characteristics that define a moon. Join Andrew and Fred Watson as they navigate these cosmic curiosities with their trademark wit and insight.
Key topics
- The effects of high-speed planetary motion near a black hole on time and observational science.
- Exploring photon pressure and its relationship to the universe's expansion and dark energy.
- The cosmic microwave background radiation and its interaction with black holes.
- Defining moons: How small and irregular can they be while still being classified as moons?
Timestamps
00:00 - Introduction and overview of listener questions
01:20 - Ron’s question about living on a fast-moving planet and time dilation effects
15:30 - Jeff’s inquiry into photon pressure and its impact on cosmic expansion
25:00 - Brian’s question regarding cosmic microwave background radiation and black holes
35:15 - Bob’s exploration of what constitutes a moon
45:00 - Closing thoughts and listener engagement
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Episode link: https://play.headliner.app/episode/35724789?utm_source=youtube