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diff --git a/movement/watch_faces/complication/astronomy_face.h b/movement/watch_faces/complication/astronomy_face.h
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+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Joey Castillo
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef ASTRONOMY_FACE_H_
+#define ASTRONOMY_FACE_H_
+
+#include "movement.h"
+#include "astrolib.h"
+
+typedef enum {
+    ASTRONOMY_MODE_SELECTING_BODY = 0,
+    ASTRONOMY_MODE_CALCULATING,
+    ASTRONOMY_MODE_DISPLAYING_ALT,
+    ASTRONOMY_MODE_DISPLAYING_AZI,
+    ASTRONOMY_MODE_DISPLAYING_RA,
+    ASTRONOMY_MODE_DISPLAYING_DEC,
+    ASTRONOMY_MODE_DISPLAYING_DIST,
+    ASTRONOMY_MODE_NUM_MODES
+} astronomy_mode_t;
+
+typedef struct {
+    astronomy_mode_t mode;
+    uint8_t active_body_index;
+    uint8_t animation_state;
+    double latitude_radians;    // this is the user location
+    double longitude_radians;   // but in radians
+    astro_angle_hms_t right_ascension;
+    astro_angle_dms_t declination;
+    double altitude;    // in decimal degrees
+    double azimuth;     // in decimal degrees
+    double distance;    // in AU
+} astronomy_state_t;
+
+void astronomy_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void astronomy_face_activate(movement_settings_t *settings, void *context);
+bool astronomy_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void astronomy_face_resign(movement_settings_t *settings, void *context);
+
+#define astronomy_face ((const watch_face_t){ \
+    astronomy_face_setup, \
+    astronomy_face_activate, \
+    astronomy_face_loop, \
+    astronomy_face_resign, \
+    NULL, \
+})
+
+#endif // ASTRONOMY_FACE_H_