Today’s episode of Astronomy Cast is about another famous physicist: Enrico Fermi. We’ve already taken a look at one of Fermi’s most famous ideas, the Fermi Paradox – or, where are all the aliens? But let’s meet the man behind the ideas, the namesake for the new Fermi mission.
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Ep. 167: Future Civilizations
Let’s assume that humans survive the next few hundred years without destroying ourselves, or the planet, and we actually become a space faring civilization. What kinds of challenges will we face, and what projects will we build to expand ourselves out into the Solar System and eventually the galaxy. You just need to think big.
Ep. 166: Multiverses
What if our universe was just one in an infinite number of parallel universes; a possible outcome from the specific predictions of quantum mechanics. The idea of multiple universes is common in science fiction, but is there any actual science to back this theory up?
Ep. 165: Doppler Effect
You know how a police siren changes sound when it passes by you? That’s the doppler effect. It works for sound waves and it works for light waves. Astronomers use the doppler effect to study the motion of objects across the Universe, from nearby extrasolar planets to the expansion of distant galaxies. Doppler shift is the change in length of a wave (light, sound, etc.) due to the relative motion of source and receiver. Things moving toward you have their wavelengths shortened. Things moving away have their emitted wavelengths lengthened.
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