StarTalk Radio Cosmic Queries – The Experience of Time with Charles Liu
Aug 18, 2023
Astrophysicist Charles Liu joins Neil deGrasse Tyson and co-hosts to explore time, spacetime, redshift, wormholes, dreams as predictions, rocket trajectory, and tools for gathering information from the body.
AI Snips
Chapters
Transcript
Episode notes
Velocity Through Spacetime
- We all move through four-dimensional spacetime at the speed of light, but mass and photons differ in how they move through space and time.
- Unlike photons that move through space only, we move noticeably through time, giving us our perception of time's passage.
Warp Speed and Causality
- Star Trek's depiction of warp speed doesn’t align with Einstein’s relativity because it implies faster-than-light travel violates causality.
- Fictionally, subspace bubbles and communications preserve causality by allowing faster-than-light interaction without time paradoxes.
Dreams, Time, and Universe Link
- There is no scientific evidence linking dreams to the universe, though philosophy has long sought such connections.
- The brain is a prediction machine, and dreams might sometimes appear prophetic due to memory adjustments and pattern matching.