Ideas
Sometimes I like to merge astronomy/data analysis and other fields:
30 day map challenge: monthly challenge of plotting maps with a pre-defined set of rules.
I made a version using Chilean astronomical data. Here is the twitter thread: linkPUC astrop-ph: analysis of the emails that I received in my inbox regarding the daily astro-ph at PUC during my Master and part of the PhD studies (~6 years). Here are the slides and conclusions that I presented: link