Archive | Physics

Ep. 444: Fractals

Episode rescheduled for Friday, March 31 at same time – changed due to travel! 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 live on AstronomyCast, or the AstronomyCast YouTube page. If you would like to join the Weekly Space […]

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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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Ep. 438: Destroy and Rebuild, Pt. 2: Geoengineering

We know humans are having an impact on planet Earth, but what if we really put our backs into it, and intentionally tried to change the entire planet? Either to make it better, or to fix some terrible mistake we’ve made. The technique is called geoengineering. Could it work? We usually record Astronomy Cast every […]

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Ep. 437: Destroy and Rebuild, Pt. 1: The Torino Scale

We love to destroy the universe, and also rebuild it. Today we begin a new series where we destroy and rebuild. Let’s talk about some existential threats we face, and ways we could recover, starting with the sword of Damocles hanging over our head: killer asteroids! We usually record Astronomy Cast every Friday at 1:30 […]

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Ep. 435: The Butterfly Effect

Small changes can have a big impact. But can a butterfly’s wingbeat in the Amazon really impact the weather halfway across the world? And where do small changes have no impact? We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30 pm Eastern / 21:30 PM UTC (9:30 GMT). You can watch […]

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Ep. 421: Space Games!

As you probably know, Fraser is an avid video gamer, especially if it has anything to do with space. Today we turn things around, as Fraser talks about the games he plays, and what he thinks you should be playing too. We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30 pm […]

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