diff --git a/public/sternenhimmel.php b/public/sternenhimmel.php
index 2709870..03c4954 100644
--- a/public/sternenhimmel.php
+++ b/public/sternenhimmel.php
@@ -6,12 +6,12 @@ ini_set('memory_limit', '512M');
 session_start();
 
 $loggedIn = isset($_SESSION['user_id']);
+$starsApiRequested = isset($_GET['stars_api']) && (string)$_GET['stars_api'] === '1';
 $pageTitle = 'Sternenhimmel - AstroTools';
 $bodyClass = 'sternenhimmel-page';
 
 $constellationData = ['constellations' => []];
 $constellationDataError = null;
-$starData = [];
 $starDataError = null;
 $messierData = [];
 $messierDataError = null;
@@ -105,31 +105,41 @@ try {
         static fn(array $a, array $b): int => strcmp($a['id'], $b['id'])
     );
 
-    $constellationData['constellations'] = array_values($constellations);
+    if ($starsApiRequested) {
+        $starData = [];
+        $starStmt = $planetariumPdo->query(
+            "SELECT hip, proper, bayer, con, spect, mag, ci, rarad, decrad
+             FROM star_hipparcos
+             WHERE mag IS NOT NULL
+               AND rarad IS NOT NULL
+               AND decrad IS NOT NULL
+               AND mag <= " . (float)$starDbMagLimit . "
+             ORDER BY mag ASC"
+        );
+        while ($row = $starStmt->fetch()) {
+            $starData[] = [
+                'hip' => $row['hip'] !== null ? (int)$row['hip'] : null,
+                'proper' => trim((string)($row['proper'] ?? '')),
+                'bayer' => trim((string)($row['bayer'] ?? '')),
+                'con' => trim((string)($row['con'] ?? '')),
+                'spect' => trim((string)($row['spect'] ?? '')),
+                'ra' => (float)$row['rarad'],
+                'dec' => (float)$row['decrad'],
+                'mag' => (float)$row['mag'],
+                'ci' => $row['ci'] !== null ? (float)$row['ci'] : null,
+            ];
+        }
 
-    $starStmt = $planetariumPdo->query(
-        "SELECT hip, proper, bayer, con, spect, mag, ci, rarad, decrad
-         FROM star_hipparcos
-         WHERE mag IS NOT NULL
-           AND rarad IS NOT NULL
-           AND decrad IS NOT NULL
-           AND mag <= " . (float)$starDbMagLimit . "
-         ORDER BY mag ASC"
-    );
-    while ($row = $starStmt->fetch()) {
-        $starData[] = [
-            'hip' => $row['hip'] !== null ? (int)$row['hip'] : null,
-            'proper' => trim((string)($row['proper'] ?? '')),
-            'bayer' => trim((string)($row['bayer'] ?? '')),
-            'con' => trim((string)($row['con'] ?? '')),
-            'spect' => trim((string)($row['spect'] ?? '')),
-            'ra' => (float)$row['rarad'],
-            'dec' => (float)$row['decrad'],
-            'mag' => (float)$row['mag'],
-            'ci' => $row['ci'] !== null ? (float)$row['ci'] : null,
-        ];
+        header('Content-Type: application/json; charset=utf-8');
+        echo json_encode([
+            'ok' => true,
+            'stars' => $starData,
+        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+        exit;
     }
 
+    $constellationData['constellations'] = array_values($constellations);
+
     $messierStmt = $planetariumPdo->query(
         "SELECT messier, name, object_type_abrev, ra_deg, dec_deg, v_mag, major_axis
          FROM dso_objects
@@ -177,6 +187,15 @@ try {
         }
     }
 } catch (Throwable $e) {
+    if ($starsApiRequested) {
+        header('Content-Type: application/json; charset=utf-8');
+        http_response_code(500);
+        echo json_encode([
+            'ok' => false,
+            'error' => $e->getMessage(),
+        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+        exit;
+    }
     $constellationDataError = $e->getMessage();
     $starDataError = $e->getMessage();
     $messierDataError = $e->getMessage();
@@ -190,10 +209,6 @@ $constellationDataErrorJson = json_encode(
     $constellationDataError,
     JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES
 );
-$starDataJson = json_encode(
-    $starData,
-    JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES
-);
 $starDataErrorJson = json_encode(
     $starDataError,
     JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES
@@ -549,7 +564,7 @@ let showStars        = true;
 // ═══════════════════════════════════════════════════════════════════════════════
 const EMBEDDED_CONSTELLATION_DATA = <?php echo $constellationDataJson ?: '{"constellations":[]}'; ?>;
 const EMBEDDED_CONSTELLATION_ERROR = <?php echo $constellationDataErrorJson ?: 'null'; ?>;
-const EMBEDDED_STAR_DATA = <?php echo $starDataJson ?: '[]'; ?>;
+const STAR_DATA_URL = 'sternenhimmel.php?stars_api=1';
 const EMBEDDED_STAR_ERROR = <?php echo $starDataErrorJson ?: 'null'; ?>;
 const EMBEDDED_MESSIER_DATA = <?php echo $messierDataJson ?: '[]'; ?>;
 const EMBEDDED_MESSIER_ERROR = <?php echo $messierDataErrorJson ?: 'null'; ?>;
@@ -1805,8 +1820,7 @@ function finalizeStarLoad() {
   if (AUTO_IMG) autoExportPng();
 }
 
-function loadEmbeddedStarsAsync() {
-  const source = Array.isArray(EMBEDDED_STAR_DATA) ? EMBEDDED_STAR_DATA : [];
+function processStarBatch(source) {
   const total = source.length;
   const chunkSize = total > 60000 ? 1800 : 1200;
   let index = 0;
@@ -1862,6 +1876,27 @@ function loadEmbeddedStarsAsync() {
   window.setTimeout(processChunk, 0);
 }
 
+async function loadEmbeddedStarsAsync() {
+  updateStarLoadingUi(0, 1);
+  if (starLoadingNote) starLoadingNote.textContent = 'Sternkatalog wird vom Server geladen ...';
+
+  const response = await fetch(STAR_DATA_URL, {
+    headers: { 'Accept': 'application/json' },
+    cache: 'no-store'
+  });
+
+  if (!response.ok) {
+    throw new Error('Sternkatalog konnte nicht geladen werden (HTTP ' + response.status + ')');
+  }
+
+  const payload = await response.json();
+  if (!payload || payload.ok !== true || !Array.isArray(payload.stars)) {
+    throw new Error(payload && payload.error ? payload.error : 'Ungültige Sternkatalog-Antwort');
+  }
+
+  processStarBatch(payload.stars);
+}
+
 // Manueller Fallback über Datei-Dialog
 document.getElementById('fileInput').addEventListener('change', function(e) {
   const file = e.target.files[0];
@@ -2017,7 +2052,13 @@ syncMessierMagLimitUi();
 setLocation(LAT_DEG, LON_DEG, ELEV_M, HEADER_LOCATION.name || 'Standard-Standort', HEADER_LOCATION.id ?? '');
 resize();
 window.requestAnimationFrame(() => {
-  window.setTimeout(loadEmbeddedStarsAsync, 40);
+  window.setTimeout(() => {
+    loadEmbeddedStarsAsync().catch(err => {
+      console.warn('Sterndaten aus der Datenbank nicht geladen:', err);
+      if (starLoadingStatus) starLoadingStatus.textContent = 'Fehler';
+      if (starLoadingNote) starLoadingNote.textContent = err && err.message ? err.message : 'Sternkatalog konnte nicht geladen werden';
+    });
+  }, 40);
 });
 
 }); // end window.onload