In updating the @apod Twitter feed, and providing an APOD Search, I've created a database of the text explanations for every Astronomy Picture of the Day. These are parsed from the original web pages. At the same time I have parsed the text to identify likely astronomical objects and piped those through LookUp to find their Right Ascension/Declination and types (using the AVM classification). I've converted the results of this into a large JSON-LD file.
All the explanations come from APOD so please make sure you credit them if you use this. If you can credit me too that would be wonderful.