TidyTuesday 2026/33

This week’s data is the Palomar spectroscopic survey of nearby galaxy nuclei by Ho, Filippenko and Sargent. For each galaxy it records the brightness of emission lines from gas in the core. I used the ratios of four of those lines to recreate a BPT diagram . Point shapes show each galaxy’s Hubble type, and the small bar chart counts them. Most are spirals. Code on GitHub