After a week of battling jet-lag, it's time to get back to some science. And this week, a new paper from the PAndAS , from Heidelberg based researcher, Michelle Collins . The target here is dwarf galaxies . Here's one from wikipedia. There's lots of dwarf galaxies out there in the Universe. In fact, in terms of number, they represent the dominant galaxies out there, but they are much smaller than our own Milky Way, so they don't have the dominant mass. Don't believe me? Well, my colleague, Alan McConnachie , recently compiled the most comprehensive compilation of the galaxies within our Local Group ; you can read the details here. So, we have three large galaxies, the Milky Way, Andromeda and Triangulum , and then almost 100 smaller galaxies, a sea of dwarf galaxies. Now, you might think that dwarfs are simple things, just a billion or so stars living together in a dark matter halo, just a smaller version of large galaxies, but no. There are a numb
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