Pegasi Ascendant: Ranking Constellation Genitives on their Aesthetic Merit
Pranav Nagarajan

TL;DR
This study ranks the aesthetic appeal of constellation genitives using a Bayesian survey of astronomers, revealing Pegasi as the most pleasing and highlighting potential generational taste differences.
Contribution
Introduces a Bayesian pair comparison method to systematically rank constellation genitives by aesthetic merit among astronomers.
Findings
Pegasi is rated as the most aesthetically pleasing genitive.
Most astronomers initially preferred Orionis, but it ranked seventh.
Gruis received the lowest aesthetic ranking.
Abstract
Despite their ubiquity in the astronomical literature, there is no consensus tier list of the genitive forms of the 88 constellations officially recognized by the International Astronomical Union. To address this pressing open question, I conduct an anonymous pair comparison survey of 74 professional astronomers to rank these constellation genitives on their aesthetic merit. After each survey response, I use active sampling to select a new set of pair comparisons that maximizes expected information gain, and update overall scores based on a fully Bayesian framework. I find that Pegasi is the most aesthetically pleasing constellation genitive overall, narrowly edging out Centauri and Andromedae. While most astronomers self-report Orionis to be their top choice before taking the survey, this well-recognized constellation genitive only places seventh in the final ranking. Gruis, meanwhile,…
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