We started out Astronomy Cast with the controversal decision to de-planet Pluto. And here we are, more than a decade later, at the brink of recording our 500th episode when another big decision is coming down from the IAU: whose name goes on the concept that our Universe is expanding: Hubble or Lemaître? It's a big deal and Pamela knows all about it.

Astronomy Cast will be on hiatus until September, 2018.  When we return, we'll be gearing up for the 500th Episode!

498: Dwarf Galaxy Update Astronomy Cast 498: Dwarf Galaxy Update by Fraser Cain & Dr. Pamela Gay

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.

497: Update on Globular Clusters Astronomy Cast 497: Update on Globular Clusters by Fraser Cain & Dr. Pamela Gay

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.

496: Update on Stellar Populations (I, II, & III) Astronomy Cast 496: Update on Stellar Populations (I, II, & III) by Fraser Cain & Dr. Pamela Gay

Another update show, this time on the various generations of stars, let's get into it.

495: Update on Asteroids & Prospects of Asteroid Mining Astronomy Cast 495: Update on Asteroids & Prospects of Asteroid Mining by Fraser Cain & Dr. Pamela Gay

Our knowledge of space is starting to match up with our ability to get out there an explore it. There are several companies working on missions and techniques to harvest minerals from asteroids. What other resources are out there that we can use?