Astronomy Cast
Astronomy Cast offers you a fact based journey through the cosmos. Each week Fraser Cain (Universe Today) and Dr. Pamela Gay (SIUE / Slacker Astronomy) take on topics ranging from the nearby planets to ubiquitous dark matter.
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Ep. 273: Solutions to the Fermi Paradox
In Episode 24 we presented the concept of the Fermi ...
In Episode 24 we presented the concept of the Fermi Paradox. In short: Where are all the aliens? Today we’re going to examine the theoretical solutions to this problem. Maybe they’re out there, but just don’t want to talk to us. Maybe it’s too hard to com
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Ep. 272: Abiogenesis
The Theory of Evolution provides a rich explanation for why ...
The Theory of Evolution provides a rich explanation for why we see the diversity of life here on Earth. There are so many lines of evidence, from genetic drift to the fossil record. But how did life start? How did things go from a collection of raw materi
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Ep. 271: Who Does What in Space and Astronomy
In past, if you looked up into the sky, you ...
In past, if you looked up into the sky, you were an astronomer. But everything has gotten so complicated. Now we have astrophysicists, and cosmologists, planetary geologists, and even exobiologists. Who does what, and how do they all interact with one ano
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Astronomy Cast at Dragon*Con 2012: Space Money
We've probed the deepest recesses of the universe, landed spacecraft ...
We've probed the deepest recesses of the universe, landed spacecraft and humans on other planets and moons but face it all of this exploration is expensive. Just a single spacecraft can cost billions. Who pays for all this stuff?
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Ep. 270: Inertia
An object at rest tends to stay at rest. An ...
An object at rest tends to stay at rest. An object in motion tends to stay in motion. Isaac Newton dismantled the traditional idea that objects would tend to slow down over time, and described the concept of inertia: the amount an object will resist chang
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Ep. 269: Mass
Last week we talked about energy, and this week we’ll ...
Last week we talked about energy, and this week we’ll talk about mass. And here’s the crazy thing. Mass, matter, the stuff that the Universe is made of, is the same thing as energy. They’re connected through Einstein’s famous formula – E=mc2. But what is
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Ep. 268: Energy
Our entire civilization depends on energy: getting it, converting it, ...
Our entire civilization depends on energy: getting it, converting it, burning it, and conserving it. But how do physicists think about energy? How do they measure and quantify it. And what is energy's special relationship with mass?
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Ep. 267: Infinities
Forever is a funny thing. Today we’re going to talk ...
Forever is a funny thing. Today we’re going to talk about infinities. That’s right, all the different kinds of possible infinities. How you add them, subtract them, and use them to think about the scale of the Universe
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Ep. 266: Archimedes
It's time to look deep into history to the birthplace ...
It's time to look deep into history to the birthplace of modern mathematics - Ancient Greece. And the most famous mathematician of the time was Archimedes. We use many of his mathematical theories and inventions to this day; others are steeped in legend a
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Ep. 265: Arthur Eddington
We can thank Arthur Eddington for much of our current ...
We can thank Arthur Eddington for much of our current understanding of stars. He provided some of the breakthrough concepts that explain what’s going on, deep inside the hottest places in the Universe. Sadly, the spacecraft associated with his name wasn’t
