Astronomy Cast

Take a facts-based journey through the universe.


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13 Seasons and more than 500 episodes await.

Ep. 551: Missing Epochs – Observing before the CMBR

Ep. 551: Missing Epochs – Observing before the CMBR

The Cosmic Microwave Background Radiation is the earliest moment in the Universe that we can see with our telescopes, just a few hundred thousand years after the Big Bang itself. What will it take for us to be able to fill in the missing gap? To see closer to the beginning of time itself?

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Ep. 550: Missing Epochs – Observing the Cosmic Dark Ages

Ep. 550: Missing Epochs – Observing the Cosmic Dark Ages

Powerful observatories like Hubble and the Very Large Telescope have pushed our vision billions of light-years into the Universe, allowing us to see further and further back in time. But there are regions which we still haven’t seen: the Cosmic Dark Ages. What’s it going to take to observe some of these earliest moments in the Universe?

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Ep. 549: Stellar nucleosynthesis revisited: In and on and around dead stars

Ep. 549: Stellar nucleosynthesis revisited: In and on and around dead stars

Last week we gave you an update on the formation of elements from the Big Bang and in main sequence stars like the Sun. This week, we wrap up with a bang, talking about the death of the most massive stars and how they seed the Universe with heavier elements.

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