Archive | Galaxies

Ep. 498: Dwarf Galaxy Update

The Milky Way has gobbled up dozens of dwarf galaxies and added them to its structure. Today we’re going to look at the ongoing hunt for the wreckage of past mergers. And what we’ve discovered about dwarf galaxies in general. Welcome to our last episode before our summer hiatus! Don’t worry, we’ll be back in […]

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Ep. 497: Update on Globular Clusters

Is it globular clusters or is it globeular clusters? It doesn’t matter, they’re awesome and we’re here to update you on them. Astronomy Cast will be celebrating their 500th episode the weekend of Sept 15-16, 2018. Want to join us in Edwardsville, Il? Check out our AC500 site here to find out how! We usually […]

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Ep 491: Exoplanet Update 2018

Finally, a big update. Have there been news in the realm of exoplanets? More news that we can possibly cover. But we’ll try our best. We usually record Astronomy Cast every Friday at 3:00 pm EDT / 12:00 pm PDT / 19:00 UTC. You can watch us live on here on AstronomyCast.com, or the AstronomyCast […]

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Ep 490: What’s New with Supernovae

Time for another update, this time we’re going to look at what’s new with supernovae. And once again, we’ve got good news, lots of new stuff to report. We usually record Astronomy Cast every Friday at 3:00 pm EDT / 12:00 pm PDT / 19:00 UTC. You can watch us live on here on AstronomyCast.com, […]

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Ep 488: Dark Energy: 2018 Edition

The updates continue. Last week we talked about dark matter, and this week we continue with its partner dark energy. Of course, they’re not really partners, unless you consider mysteriousness to be an attribute. Dark energy, that force that’s accelerating the expansion of the Universe. What have we learned? This show was recorded Monday, 4/23/2018. […]

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Ep. 415: Temperature of the Universe

The temperature of the Universe can vary a dramatic amount from the hot cores of stars to the vast cold emptiness of deep space. What’s the temperature of the Universe now, and what will it be in the future? Download the show [MP3] | Jump to Shownotes | Jump to Transcript (more…)

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M81 in ultraviolet. Image credit: NASA

Ep. 414: Navigating Far

In our last episode, we talked about what it’ll take to navigate across the Solar System. In this episode we scale things up and speculate how future civilizations will navigate to other stars and even other galaxies. Download the show [MP3] | Jump to Shownotes | Jump to Transcript (more…)

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Ep. 408: Universe Cannibalism

We’ve talked about stellar cannibalism and galactic cannibalism, but now it’s time to take this concept to its logical extreme – universe cannibalism. In the multiverse theory of physics we live in just one of a vast range of universes which might interact with each other. Let’s look for the evidence. Download the show [MP3] […]

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Ep. 407: Galactic Cannibalism

Remember when we told you that the Universe is a big place, and anything that can go wrong, inevitably does? Today we talk about what happens when galaxies come together. This is particularly pertinent because our Milky Way will collide with Andromeda in the future! Download the show [MP3] | Jump to Shownotes | Jump […]

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