Nutze Skyfield fuer praezisere Daemmerungsberechnung

public/py/vendor/skyfield/errors.py

@@ -0,0 +1,21 @@
+"""Exceptions specific to the Skyfield library."""
+
+class DeprecationError(Exception):
+    """Explain that a Skyfield feature has been removed."""
+
+class EphemerisRangeError(ValueError):
+    """An ephemeris has been asked about positions outside its time range.
+
+    Attributes:
+
+    - `start_time`, `end_time`: the range of times supported by the segment
+    - `time_mask`: Boolean array where ``True`` marks out-of-range times
+    - `segment`: the ephemeris segment that was asked for positions
+
+    """
+    def __init__(self, message, start_time, end_time, time_mask, segment):
+        self.args = message,
+        self.start_time = start_time
+        self.end_time = end_time
+        self.time_mask = time_mask
+        self.segment = segment