StarTalk Radio Cosmic Queries – Negative Gravity
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May 13, 2025 What happens when matter turns into energy? Dive into the engaging world of gravity and its curious behavior with Neil deGrasse Tyson and Paul Mecurio. From time travel theories to the stellar origins of our solar system, they tackle audience questions with humor. Explore the cosmic dance between stars and black holes, plus whimsical discussions on alien perspectives. With a blend of science and pop culture, the mysteries of the universe never felt so entertaining!
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Time Machines Are Space Machines
- Every time machine must move through both time and space to land safely on Earth at a past date.
- If it only travels in time without space adjustment, it would end up in empty space, away from Earth's position.
Black Holes Will Outlive Stars
- Black holes will eventually outnumber stars as stars burn out over trillions of years.
- Currently, the initial mass function creates many low-mass stars but very few high-mass stars that become black holes.
Speed of Light Is Fundamentally Constant
- The speed of light is a fundamental universal constant unaffected by arbitrary units.
- Its precise value defines the meter, so improving its measurement refines length measurement.