All 88 IAU constellations, the complete official map of the sky, built dense because small datasets earn their place that way: every row carries meaning, symbolism, area with rank, coordinates, quadrant, brightest star with magnitude, main-star counts, Messier objects, meteor showers and the bordering constellations, so the celestial sphere ships as an adjacency list. The history is the Origin columns: 47 Ancient rows survive from Ptolemy's 48 (Argo Navis was split, which is why the arithmetic is honest), and the 41 Modern rows carry their year and introducer, mostly Lacaille filling the southern sky from Cape Town in 1756 and naming constellations after laboratory equipment. Zodiac flags the classical twelve (Ophiuchus crosses the ecliptic but the zodiac is a cultural artifact, so it honestly stays N). Structural guarantees by test: the 88 areas sum to the whole sky (41,253 square degrees, within one percent), Hydra is rank 1 and Crux rank 88, the border graph is at least 85% symmetric (neighbor lists cap at twelve, so the giants lose a few reciprocals), and Named_Stars_Count reconciles LOSSLESSLY against the platform's own Named Stars dataset: all 653 of its stars land in exactly one constellation here, the first time one CodeSights dataset audits another. Quadrants are stated where the infobox still carries them and derived from RA and Dec where a template migration dropped the row, which is pure arithmetic either way. Built with a 12-test acceptance suite.
88 rows in one CSV file, with 29 columns in total: Constellation, IAU_Abbr, Genitive, Meaning, Symbolism, Origin, Origin_Year, Introduced_By, Former_Name, Split_From, Zodiac, Area_SqDeg, Area_Rank, Quadrant, RA_Hours, Dec_Degrees, Hemisphere, Brightest_Star, Brightest_Magnitude, Main_Stars, Bayer_Flamsteed_Stars, Stars_Brighter_Than_Mag3, Named_Stars_Count, Messier_Objects, Meteor_Showers, Meteor_Shower_Count, Bordering_Constellations, Borders_Count, Constellation_URL.
It is built by programmatically scraping en.wikipedia.org, last pulled on 2026-09-24. Datasets are versioned; older versions stay downloadable.
Yes. Every CodeSights dataset is completely free as a CSV download; a free account is all it takes. Anyone can preview the data without signing in.
Yes. The exact Python scraper that built it is viewable on the dataset page by any signed-in member, so every number is reproducible.
Constellation joins the Named Stars dataset's Constellation column; Named_Stars_Count here equals each constellation's row count there, verified by test.
Automated scraping leaves room for error and the underlying sources change over time, so no version is guaranteed accurate or complete. If a number matters, verify it against the original source.