AstronomyCast 173: The Herschel Space Observatory

We survived our first group of mysteries, so now we move onto our second set of stuff of amazing Milky Way mysteries. How many spiral arms does our galaxy have, and why does everything keep dying every 60 million years or so?

This week we continue the story of galaxy formation, learning how groups of galaxies come together to form the biggest structures around – galaxy superclusters. And when you look at the Universe at this scale, environment is everything.

AstronomyCast 172: William Herschel

AstronomyCast 171: Solar System Movements & Positions

We've wrapped up our Solar System mysteries and now we move onto the Milky Way mysteries, and the some of the general mysteries of galaxies. From blue stragglers to Eta Carinae... what's going on?

AstronomyCast 170: Coordinate Systems

AstronomyCast 169: The Fermi Mission

Apparently this is at least a 2 part series. This week we continue examining some of the baffling mysteries of the Solar System, where we fill your head with more questions than answers. Sometimes we've just got to share the enjoyment of not knowing the answer.