Create fetch.py

fetch.py

@@ -0,0 +1,25 @@
+import os
+import requests
+from datetime import datetime
+import streamlit as st
+
+def fetch_asteroid_data(start_date: datetime, end_date: datetime):
+    api_key = os.getenv("NASA_API_KEY")
+    if not api_key:
+        st.error("NASA_API_KEY is not set as an environment variable.")
+        st.stop()
+
+    params = {
+        "start_date": start_date.strftime("%Y-%m-%d"),
+        "end_date": end_date.strftime("%Y-%m-%d"),
+        "api_key": api_key
+    }
+
+    with st.spinner("Fetching asteroid data from NASA..."):
+        try:
+            response = requests.get("https://api.nasa.gov/neo/rest/v1/feed", params=params)
+            response.raise_for_status()
+            return response.json()
+        except requests.exceptions.RequestException as e:
+            st.error(f"Error accessing NASA API: {e}")
+            return None