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SwiftAA • AA.js • QLFits • FITSImporter • ObjCFITSIO
AA.js
Astronomical Algorithms in javascript.
AA.js is the port in javascript of the C++ implementation of Astronomical Algorithms by J.P. Naughter, called AA+, based on the reference text book by Jean Meeus.
AA.js is the backbone of scientific algorithms used in arcsecond.io.
I am the author of the Swift version too. It's called SwiftAA.