Astronomy Cast

Take a facts-based journey through the universe.


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13 Seasons and more than 500 episodes await.

Ep. 571: Extreme Binaries

Ep. 571: Extreme Binaries

We’re familiar with regular binary stars. Two stars orbiting each other. Simple. Of course, the Universe has come up with every combination of things orbiting other things. And this week we look at the extreme version of this.

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Ep. 570: Discovering Comets

Ep. 570: Discovering Comets

Discovering comets is one of the fields that amateurs can still make a regular contribution to astronomy. But more and more telescopes are getting found by spacecraft, automated systems and machine learning. This week, we’ll talk about how comets are discovered and how you can get your name on one.

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Ep. 569: Ethics of Commercial and Military Space, Part 1: Private Space Flight

Ep. 569: Ethics of Commercial and Military Space, Part 1: Private Space Flight

Every year, more and more people are making their way to space. Some private citizens have already gotten their astronaut wings, paying for a trip to space out of their own pocket. What are the ethical implications of this as the costs of spaceflight come down?

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