93: Baby Galaxies

This week, it's baby galaxies — the very, very ancient, and the surprisingly brand new. Emily looks back at the earliest things-we-might-consider-galaxies, and the competing models for how they formed. Then we take a peek into the beautiful M81 galaxy, which is, as we speak, sloughing off some of its stars and galaxy stuff, thanks to an ongoing fight with M82 next door. The fun part is, the extra stuff seems to be forming into a new galaxy — albeit one with a difficult future ahead ...