StarTalk Radio
Cosmic Queries – Quantum & Aliens with Charles Liu
Sep 29, 2023
Astrophysicist Charles Liu joins Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly to answer questions about aliens, gravitons, and the unknowns of the universe. They discuss the concept of fields and particles, time travel and energy release, the importance of understanding AI, gravity's voice, time and relativity, and the debate over the largest objects in the universe.
45:45
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Quick takeaways
- The observable universe is defined by the limit of how far light has had time to reach us since the beginning of the universe, regardless of the telescope's location in a distant galaxy.
- Burning fossil fuels releases stored energy from the sun and redistributes it to our planet, contributing to climate change by intensifying energy in our atmosphere through the greenhouse effect.
Deep dives
The Observable Universe
The observable universe is not affected by the location of a telescope in a distant galaxy. The observable universe is defined by the limit of how far light has had time to reach us since the beginning of the universe. No matter where we place a telescope, the observable universe will remain the same.
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