Category: Podcasts

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When you think about the best pictures in astronomy, almost every one is a nebula; the pillars of creation in the Eagle Nebula, or the complex Helix Nebula – or my personal favorite, the Ring Nebula. They’re beautiful, wispy clouds of gas and dust that signify both the birth and death of stars. Today we give tribute to nebulae.

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Nebulae – Transcript and show notes.

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Another week, another roundup of your questions. This week listeners asked: what is galactic dust anyway, and where does it come from? Why can photons move at the speed of light? And how can astronomers know what happened right after the Big Bang? And there’s even more. If you’ve got a question for the Astronomy Cast team, please email it in to [email protected] and we’ll try to tackle it for a future show. Please include your location and a way to pronounce your name.

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Galactic Dust, the Speed of Photons, and the Big Bang Calculations – Transcript and show notes.

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Another week, another roundup of your questions. This week listeners asked: are we all going to die in 2012 when the solar system passes through the galactic plane? Did Venus make the Moon? And what will extraterrestrials see when the Sun is dead and gone? And there’s even more. If you’ve got a question for the Astronomy Cast team, please email it in to [email protected] and we’ll try to tackle it for a future show.

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Alignment with the Galactic Plane, Destruction from Venus, and the Death of the Solar System – Transcript and show notes.

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Last week we looked at the complete life of the Sun, birth to death. But stars can be smaller, and stars can get much much larger. And with a change in mass, their lives change too. Let’s start the clock again, and see what happens to the smallest stars in the Universe; and what happens to the largest.

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The Life of Other Stars – Transcript and show notes.

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Another week, another roundup of your questions. This week listeners asked: if forces are communicated through particles, can we run out? If you were traveling at light speed, when would you know to stop? And there’s even more. If you’ve got a question for the Astronomy Cast team, please email it in to [email protected] and we’ll try to tackle it for a future show.

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Or subscribe to: astronomycast.com/podcast.xml with your podcatching software.

Running Out of Gravitons and Hitting the Brakes at Light Speed – Transcript and show notes.

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Another week, another roundup of your questions. This week listeners asked: will reaching light speed destroy the Universe? When is Andromeda going to look really, really cool with the unaided eye? Why didn’t dark matter all turn into black holes? And there’s even more. If you’ve got a question for the Astronomy Cast team, please email it in to [email protected] and we’ll try to tackle it for a future show.

Click here to download the episode.

Or subscribe to: astronomycast.com/podcast.xml with your podcatching software.

Questions Show – Light speed, Andromeda Galaxy, Dark Matter and Black Holes show notes.

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Look around you. Breathe in some air. Everything you can see and feel was formed in a star. Today we’ll examine that long journey that matter has gone through, forged and re-forged in the hearts of stars. In fact, the device you’re using to listen to this podcast has some elements formed in a supernova explosion.

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Nucleosynthesis: Elements from Stars show notes.