Jpl horizons algorithm delta t#4673

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ssimard2504 wants to merge 12 commits intoStellarium:masterfrom

ssimard2504:JPL_horizons_algorithm_deltaT

Commits on Nov 27, 2025

Add ERFA 2.0.2 static library integration- Added external/erfa_201 folder with ERFA sources and CMakeLists.txt- Included license files from ERFA project- Updated top-level and module CMakeLists.txt…
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Adding code for updated JPL Horizons Delta-T algorithm
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Revsied testDeltaT to validate new algorithm of Delta-T JPL Horizons Algorithm
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Commits on Dec 3, 2025

Rename erfa_201 to erfa, merge ERFA build logic into external/CMakeLists.txt
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Commits on Dec 4, 2025

Update Stellarium User Guide for new JPL Horizons Delta-T algorithm
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Commits on Dec 5, 2025

Minor tweak to the text + added newFeature to flag v 26.1
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