I dealt with non-research things today! But late in the day, I got in some Gaia DR2 visualization time with Lauren Anderson (Flatiron)> She can in-real-time manipulate the entirety of DR2 (>1 billion stars) in a Jupyter notebook using vaex, which was designed (beautifully) for this purpose. We looked at halo substructure. I'm sure I'm seeing things in the halo, but how to know?
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