Astronomy Cast takes a fact based journey through the cosmos as it offers listeners weekly discussions on astronomical topics ranging from planets to cosmology. The show brings the questions of an avid astronomy lover direct to an astronomer. So explore what is known and being discovered about the universe around us.

Ep 487: Dark Matter: 2018 Edition

12 Apr 2018 at 7:00pm
Last week, we gave you an update in particle physics. This week it’s time to see what’s new in the world of dark matter. Spoiler alert, we still have no idea what it is, but maybe a few more ideas for what it isn’t. Read more...

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Ep 486: Particle Physics Update

5 Apr 2018 at 7:00pm
It’s time for a news update. This time from the field of particle physics. It turns out there have been all kinds of new and interesting particles discovered by the Large Hadron Collider and others. Let’s get an update from Pamela. Read more...

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Ep 485: Docking, Refueling, and Transferring

29 Mar 2018 at 7:00pm
It’s one thing to get to space. But once you’ve made it there, what do you want to do? You’ll probably want to dock with another space ship, deliver cargo, refuel. Today we’ll talk about how all that happens. Read more...

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Ep 484: Transfer Orbits and Gravitational Assists

22 Mar 2018 at 7:00pm
If you want to get around in the Solar System, you’ll want to take advantage of natural gravitational speed boosts and transfer orbits. Whether you’re heading to the outer Solar System or you want to visit the Sun itself, the planets themselves can help you in your journey. Read more...

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Ep 483: Stopping in Space

15 Mar 2018 at 7:00pm
It’s one thing to get from Earth to space, but sometimes you want to do the opposite. You want to get into orbit or touch down gently on the surface of a planet and explore it. How do spacecraft stop? And what does that even mean when everything is orbiting? Read more...

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Ep 482: Alternative Ways to Space

8 Mar 2018 at 6:00pm
Getting to space is all about rockets, but people are trying to figure out other methods that could carry payloads to orbit and beyond. Railguns, airplanes, tethers and more. Today we’ll talk about alternative methods of spaceflight. Read more...

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Ep 481: Rockets pt. 3 - Going Faster, Higher, Farther after Fairing Separation

1 Mar 2018 at 6:00pm
We’ve seen rockets blast off from here on Earth. But that’s only half the story. Rockets have additional stages to push them into trajectories, like transfer orbits and various orbital manouvers. Let’s talk about what happens after the rocket is long gone, beyond our sight. Read more...

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Ep 480: Rockets pt. 2- Multi-stage Boosters

22 Feb 2018 at 6:00pm
The vast majority of rockets are multi-staged affairs. Why is this? What makes this kind of rocket so successful? Today we look at the ins and outs of multi-stage rockets. Read more...

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Ep. 478: Apollo 8 with Paul Hildebrandt

8 Feb 2018 at 6:00pm
On Christmas Day, 1968 Frank Borman, James Lovell and William Anders became the first human being to see the far side of the Moon. Their mission, of course, was Apollo 8, the first time human beings had ever left Earth orbit and seen the far side of the Moon. Today we talk all about Apollo 8, wit... Read more...

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Ep. 477: State of Exploration: Once and Future Moon

1 Feb 2018 at 6:00pm
It's been decades since humans set foot on the Moon. Well, it's time to go back, in theory. Of course, we've heard this all before. What are the plans afoot to send humans back to the Moon this time. What hardware will we use, and what other strategies are in the works to make this happen? Read more...

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Astronomy Cast Resources

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