Hubble sees mini galaxies surrounding Andromeda are pretty wild

Surrounding the Andromeda galaxy, three dozen tiny galaxies aren't behaving the way scientists expected. NASA's Hubble Space Telescope has trained on Andromeda for a deep dive into how its orbiting satellite galaxies formed and changed over time. What they found revealed a population of dwarf galaxies that are quite unlike the ones circling the Milky Way. Some 2.5 million light-years away, these space neighborhoods formed the bulk of their stars long ago. But rather than