StarTalk Radio
Cosmic Queries – Negative Gravity
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!
47:50
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Quick takeaways
- Time travel requires accounting for the universe's dynamic movements, making it essential to consider Earth's location when traveling back in time.
- The humorous critique of human social media habits during hypothetical alien encounters prompts reflections on the values and priorities defining human intelligence.
Deep dives
The Significance of Time Travel and Space Coordination
Time travel involves not just moving through time but also space because Earth and the solar system are constantly moving in the universe. This means that when one travels back in time, they must also account for the coordinates of where Earth will be in that specific time period. For example, if a time traveler were to set their machine to a date 2,000 years ago, they would need to consider that the entire solar system's positioning would have changed during that time, potentially leaving them in empty space. This crucial detail underscores the complexity of time travel as a concept intertwined with the physics of space.
