Nutze Skyfield fuer praezisere Daemmerungsberechnung

public/py/vendor/skyfield/_compatibility.py

@@ -0,0 +1,10 @@
+import numpy as np
+
+# Old versions of interp() sometimes return a plain Python float,
+# instead of always returning at least a NumPy float64 object.
+
+interp = np.interp
+
+if isinstance(interp(1.0, [0.0, 2.0], [10.0, 20.0]), float):
+    def interp(*args):
+        return np.array(np.interp(*args))