Then in 1928, the International Astronomical Union (IAU) imposed constellation boundaries based on lines of right ascension and declination — thus adopting 88 official constellations. The IAU did not set standards for the outlines of the constellations themselves, however.
When using my astronomy software or looking at various books, I notice that not everyone draws the constellations the same way. Why?
John Hinkamp, Andros Island, Bahamas