Archive | Physics

Ep. 474: Predictions for 2018

Join us at a special date/time for this episode! Pamela’s traveling so we’re recording this on Saturday, 1/6/2018, at 2 pm EST / 11 am PST / 19:00 UTC! Phew, 2018, time to press the reset button and enjoy a whole new year of space exploration and space science. What’s coming up this year? What […]

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Ep. 473: Remembering the Best Space Science of 2017

2017 was a crazy year for, well, you know. But, it was a great year for space science, a kilonova, extrasolar planets, reusable rockets and more. Let’s look back at the year that was and remember our favorite space science. We usually record Astronomy Cast every Friday at 3:00 pm EST / 12:00 pm PST […]

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Ep. 466: Origins of Zero (0)

We depend on zero for our math to work right, but this number was actually invented in fairly recent times. Why do we need zero? Was it inevitable? Note: Due to how Pamela had to record, the audio on the Full Raw Feed is not up to our usual quality this episode. Chad did wonders […]

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Ep. 465: Exploiting Interfering Light

Electromagnetic radiation, also known as “light” is pretty handy for astronomers. They can use it to directly and indirectly observe stars, nebula, planets and more. But as you probably know, light can act like a wave, creating interference patterns tto teach us even more about the Universe. We usually record Astronomy Cast every Friday at […]

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Ep. 444: Fractals

For this historic 444th episode of Astronomy Cast, we talk about fractals. Those amazing mathematical visualizations of recursive algorithms. What are they, how do you get them? Why are they important? We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/ 20:30 PM UTC (8:30 GMT). You can watch us […]

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Ep. 443: Destroy and Rebuild Pt. 7: Tsunamis

Surf’s up! Today we’re going to be talking about one of the most devastating natural disasters out there: tsunamis. We’re talking huge waves that wreck the seashore. But it turns out, there many ways you can get a tsunami, and one of those has to do with space. We usually record Astronomy Cast every Friday […]

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Ep. 442: Destroy and Rebuild Pt. 6: Magnetic Pole Reversal

If we look back into the geologic record of the Earth, it appears that our planet’s magnetic field flips polarity every few hundred thousand years or so. Why does this happen? When’s it supposed to happen next? Is it dangerous? We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30 pm Eastern […]

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Ep. 441: Destroy and Rebuild, Pt. 5: Continental Drift

Want to travel the world but you don’t have a lot of money? No problem, your continent is drifting across the surface of the Earth right now. In a few million years, you’ll reach your destination. We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30 pm Eastern / 21:30 PM UTC […]

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Ep. 440: Destroy and Rebuild, Pt. 4: Supervolcanoes!

There are regular volcanoes, and then there are the supervolcanoes. Massive calderas of hot magma of incomprehensible size. Bad news, these things explode randomly and catastrophically. Worse news, there are a bunch around the Earth. We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30 pm Eastern / 21:30 PM UTC (9:30 […]

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Ep. 439: Destroy and Rebuild, Pt. 3: How Do We Terraform Earth?

We always want to talk about how we can make Mars more Earth like, but the reality is that we’re making Earth more Venus-Like. We’re Venusforming Earth. What are the various factors we’re impacting on a global scale, and how can we fix them? We usually record Astronomy Cast every Friday at 1:30 pm Pacific […]

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