StarTalk Radio Cosmic Queries: Time-Keeping
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Dec 31, 2024 Dive into the fascinating concept of time! Explore how timekeeping has evolved from sundials to atomic clocks, and indulge in playful discussions about whether time even exists. Delve into the philosophy behind Einstein's theories, unravel cosmic mysteries, and laugh at the absurdity of Superman's time-altering antics. Discover how our perception of time shapes cultural norms and whether the universe itself acts as a time machine. It's a delightful mix of humor, science, and audience curiosity!
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Time's Beginning and Nature
- Time, as defined by physicists, had a beginning with the Big Bang.
- It's considered "semi-infinite," extending infinitely into the future but having a finite start.
Time as a Measurement Construct
- Time is measured through repeating phenomena, like a clock's ticking or Earth's rotation.
- If nothing repeats, time loses its meaning, suggesting it's a construct for measurement.
Timekeeping in Space
- Apollo astronauts used "Houston time" on the moon, highlighting the human element in timekeeping.
- Mars professionals often use "Mars time," reflecting the planet's different day length.