Astronomy Cast

AstronomyCast 173: The Herschel Space Observatory

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

AstronomyCast 170: Coordinate Systems

AstronomyCast 169: The Fermi Mission

We finally get organized enough deal with several listener questions: isn�t dark matter just regular stuff we can�t see? how can parts of the Universe be expanding faster than the speed of light? what will Betelgeuse look like when it explodes as a supernova? what�s the speed of gravity? All these and more questions are answered.