Ep. 47: Tidal Forces

Consider the following: we’ve got tides here on Earth, the Moon only shows one face to the Earth, we’ve got volcanoes on Io, and ice geysers on Enceladus. All these phenomena originate from a common cause: the force of gravity stretching across space to tug at another world. Episode 47: Tidal Forces (13.4MB) 




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Ep. 46: Stellar Nurseries

We’ve discussed star formation in the past, but now we wanted to talk about the different kinds of stellar nurseries we see across the Universe. We know where our Sun came from because we can look out and see different stellar neighborhoods at every stage of development. It takes a village of gas and dust […]




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Ep. 45: The Important Numbers in the Universe

This week we wanted to give you a basic physics lesson. This isn’t easy physics, this is a lesson on the basic numbers of the Universe. Each of these numbers define a key aspect of our Universe. If they had different values, the Universe would be a changed place, and life here on Earth would […]




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Listener Survey

Thank you for your interest in the survey, but we have completed gathering data. If you would like to see the results of this survey, check out our paper in Communicating Astronomy with the Public It’s time to answer questions again, but this time we hope that you’ll take a minute and answer ours. We’ve […]




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Ep. 44: Einstein’s Theory of General Relativity

If you remember way back to Episode 9, we covered Einstein’s Theory of Special Relativity. Well, that’s only half of the relativity picture. The great scientist made an even more profound impact on physics with his theory of general relativity, replacing Newton with a better model for gravity. Episode 44: Einstein’s Theory of General Relativity […]




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Ep. 43: Questions Show #5

It’s time to answer the questions again. And this time we’ve got some doozies. Is the Universe rotating? Is space something, or is it nothing? Is dark energy evenly distributed? What would happen if an astronaut went out the airlock, without a spacesuit. Want to know the answers? Well, you’ve got to listen.   Episode […]




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Ep. 42: Magnetism Everywhere

You probably don’t realise it, but magnetic fields are everywhere. We’re not talking about the magnets in your speakers, your electronic equipment or on the fridge door. We’re talking about the gigantic magnetic fields that surround planets, stars, galaxies and some of the most exotic objects in the Universe.  Episode 42: Magnetism Everywhere (13.5MB) 




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Ep. 41: The Rise of the Supertelescopes

The last decade has been the golden age of astronomy, with new observatories and space telescopes pushing out our understanding of the Universe. We can see billions of light years away, watch dynamic events unfold in almost real-time, and see into every corner of the electromagnetic spectrum. Just you wait: things will only get better. […]




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Ep. 40: American Astronomical Society Meeting, May 2007

Once again, Pamela does her duty as an astronomer and joins her colleagues at the American Astronomical Society’s meeting, held in May, 2007 on Honolulu, Hawaii. With all that sand, surf and sun, how did anyone get any science done? Pamela tracked down the interesting stories, and brought them back so we could analyze them. […]




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Ep. 39: Astrology and UFOs

While Pamela’s away at the American Astronomical Society meeting, we brought in a special guest to help debunk some of the pseudoscience that people mistake for astronomy. Dr Steven Novella from the Skeptic’s Guide to the Universe gets to the bottom of astrology and UFOs, and why they’re not real science. Episode 39: Astrology and […]




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