修正bug

.gitignore

@@ -0,0 +1,14 @@
+# Resources
+资源文件/
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environments
+.env*
+!.env.example
+
+# IDEs
+.vscode/
+.idea/

backend/app/services/horizons.py

@@ -67,6 +67,123 @@ class HorizonsService:
             logger.error(f"Error fetching raw data for {body_id}: {repr(e)}")
             raise
 
+    async def search_body_by_name(self, name: str, db: AsyncSession = None) -> dict:
+        """
+        Search for a celestial body in Horizons by name.
+        
+        Args:
+            name: Name to search (e.g. 'Ceres', 'Halley')
+            db: Database session (optional, for future caching)
+            
+        Returns:
+            Dict with success/error and data
+        """
+        url = "https://ssd.jpl.nasa.gov/api/horizons.api"
+        # Using a wildcard search command
+        cmd_val = f"'{name}*'"
+        
+        params = {
+            "format": "text",
+            "COMMAND": cmd_val,
+            "OBJ_DATA": "YES",
+            "MAKE_EPHEM": "NO"
+        }
+        
+        try:
+            client_kwargs = {"timeout": settings.nasa_api_timeout}
+            if settings.proxy_dict:
+                client_kwargs["proxies"] = settings.proxy_dict
+            
+            async with httpx.AsyncClient(**client_kwargs) as client:
+                logger.info(f"Searching Horizons for: {name}")
+                response = await client.get(url, params=params)
+                
+                if response.status_code != 200:
+                    return {"success": False, "error": f"NASA API Error: {response.status_code}"}
+                
+                text = response.text
+                
+                # Case 1: Direct match (Horizon returns data directly)
+                # Look for "Target body name:" or similar indicators of a resolved body
+                if "Target body name:" in text or "Physical properties" in text:
+                    # Extract ID and Name
+                    # Pattern: "Target body name: 1 Ceres (A801 AA)" or similar
+                    match = re.search(r"Target body name:\s*(.*?)\s*\{", text)
+                    if not match:
+                         match = re.search(r"Target body name:\s*(.*?)\n", text)
+                    
+                    full_name = match.group(1).strip() if match else name
+                    
+                    # Try to extract ID from the text, usually in the header or COMMAND output
+                    # This is tricky with raw text, but let's try to extract from the command echo
+                    # Or we can just use the input name if we can't find a better ID
+                    # Ideally we want the numeric ID (e.g. '1' for Ceres, '399' for Earth)
+                    
+                    # If it's a direct match, the ID might not be explicitly listed as "ID = ..."
+                    # But often the name contains it, e.g. "1 Ceres"
+                    body_id = name # Fallback
+                    
+                    # Try to parse "1 Ceres" -> id=1
+                    id_match = re.search(r"^(\d+)\s+([a-zA-Z]+)", full_name)
+                    if id_match:
+                        body_id = id_match.group(1)
+                        clean_name = id_match.group(2)
+                    else:
+                        clean_name = full_name
+                        
+                    return {
+                        "success": True,
+                        "id": body_id,
+                        "name": clean_name,
+                        "full_name": full_name
+                    }
+
+                # Case 2: Multiple matches (Ambiguous)
+                # Horizons returns a list of matches
+                if "Multiple major-bodies match" in text or "Matching small-bodies" in text:
+                    # We need to parse the list and pick the best match or return the first one
+                    # For now, let's try to find the most likely match (exact name)
+                    
+                    # Pattern for small bodies: "record #  epoch-yr   primary desig  >name<"
+                    # or "   ID    Name                               Designation"
+                    
+                    # Simple heuristic: Look for lines containing the name
+                    lines = text.split('\n')
+                    best_match = None
+                    
+                    for line in lines:
+                        if name.lower() in line.lower():
+                            # Try to extract ID (first column usually)
+                            parts = line.strip().split()
+                            if parts and parts[0].isdigit() or (parts[0].startswith('-') and parts[0][1:].isdigit()):
+                                best_match = {
+                                    "id": parts[0],
+                                    "name": name,
+                                    "full_name": line.strip()
+                                }
+                                break
+                    
+                    if best_match:
+                         return {
+                            "success": True, 
+                            "id": best_match["id"],
+                            "name": best_match["name"],
+                            "full_name": best_match["full_name"]
+                        }
+                    
+                    return {"success": False, "error": "Multiple matches found, please be more specific"}
+
+                # Case 3: No match
+                if "No matches found" in text:
+                    return {"success": False, "error": "No celestial body found with that name"}
+                
+                # Fallback for unknown response format
+                return {"success": False, "error": "Could not parse NASA response"}
+                
+        except Exception as e:
+            logger.error(f"Search error for {name}: {repr(e)}")
+            return {"success": False, "error": str(e)}
+
     async def get_body_positions(
         self,
         body_id: str,

frontend/ASSET_LOADING_ANALYSIS.md

@@ -0,0 +1,390 @@
+# Cosmo Frontend Asset Loading Strategy Analysis
+
+## Executive Summary
+
+The Cosmo frontend project implements a 3D solar system visualization using Three.js and React-Three-Fiber. The asset loading strategy currently uses a mix of on-demand fetching and preloading patterns, with assets served through a backend API proxy.
+
+---
+
+## 1. Asset Inventory
+
+### 1.1 Texture Assets (Primary Location: Backend Upload)
+
+**Backend Location**: `/Users/jiliu/WorkSpace/cosmo/backend/upload/texture/`
+- **Total Size**: ~19 MB
+- **Format**: Primarily JPEG with some PNG
+- **Built/Dist Location**: `/Users/jiliu/WorkSpace/cosmo/frontend/dist/textures/`
+
+#### Key Texture Files (by size):
+
+| File | Size | Purpose |
+|------|------|---------|
+| 2k_moon.jpg | 1.0 MB | Moon surface texture |
+| 2k_venus_surface.jpg | 868 KB | Venus surface |
+| 2k_mercury.jpg | 856 KB | Mercury surface |
+| 2k_sun.jpg | 804 KB | Sun/Star texture |
+| 2k_mars.jpg | 736 KB | Mars surface |
+| 2k_jupiter.jpg | 488 KB | Jupiter surface |
+| 2k_earth_daymap.jpg | 456 KB | Earth day side |
+| 2k_earth_nightmap.jpg | 256 KB | Earth night side |
+| 2k_stars_milky_way.jpg | 248 KB | Milky Way background |
+| 2k_neptune.jpg | 236 KB | Neptune surface |
+| 2k_venus_atmosphere.jpg | 228 KB | Venus atmosphere |
+| 2k_saturn.jpg | 196 KB | Saturn surface |
+| 2k_uranus.jpg | 76 KB | Uranus surface |
+| 2k_saturn_ring_alpha.png | 12 KB | Saturn ring transparency |
+
+**Additional Textures** (comets, dwarf planets, moons):
+- 2k_pluto.jpg: 3.8 MB (largest single file)
+- Various comet/asteroid textures: 300-500 KB each
+- Moon textures (Ganymede, Io, Titan, Mimas): 350-360 KB each
+
+---
+
+### 1.2 3D Model Assets (GLB/GLTF Format)
+
+**Backend Location**: `/Users/jiliu/WorkSpace/cosmo/backend/upload/model/`
+- **Total Size**: ~24 MB
+- **Format**: GLB (binary GLTF)
+
+#### Key Model Files (by size):
+
+| File | Size | Purpose |
+|------|------|---------|
+| juno.glb | 8.6 MB | Juno space probe |
+| cassini.glb | 1.6 MB | Cassini spacecraft |
+| voyager_2.glb | 1.6 MB | Voyager 2 probe |
+| parker_solar_probe.glb | 436 KB | Parker Solar Probe |
+| voyager_1.glb | 280 KB | Voyager 1 probe |
+| webb_space_telescope.glb | ~1-2 MB (from list) | JWST |
+| new_horizons.glb | ~1-2 MB (from list) | New Horizons probe |
+| perseverance.glb | ~1-2 MB (from list) | Mars Perseverance rover |
+
+**Observations**:
+- Juno.glb (8.6 MB) is significantly larger than other models
+- Most probes range 280 KB to 1.6 MB
+- Total probe models: ~24 MB for ~8 spacecraft
+
+---
+
+## 2. Asset Loading Strategy
+
+### 2.1 Texture Loading (Detailed Implementation)
+
+**File**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/components/CelestialBody.tsx`
+
+```typescript
+// Current Loading Pattern:
+1. Component mounts (Planet component)
+2. fetchBodyResources(body.id, 'texture') - calls API
+3. Finds main texture (excludes 'atmosphere' and 'night')
+4. Constructs URL: /upload/{file_path}
+5. useTexture(texturePath) - Three.js texture loader
+6. Renders mesh with loaded texture
+
+// Key Line:
+const texture = texturePath ? useTexture(texturePath) : null;
+```
+
+**Loading Characteristics**:
+- **Type**: On-demand (per celestial body)
+- **Caching**: useTexture hook likely caches within session
+- **Error Handling**: Falls back to null (gray placeholder material)
+- **Performance**: No preloading - each body texture loads when component mounts
+
+### 2.2 Model Loading (3D Probes)
+
+**File**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/components/Probe.tsx`
+
+```typescript
+// Current Loading Pattern:
+1. Component mounts (Probe component)
+2. fetchBodyResources(body.id, 'model') - calls API
+3. Gets first model resource + scale metadata
+4. Constructs URL: /upload/{file_path}
+5. useGLTF.preload(fullPath) - PRELOADING ENABLED
+6. setModelPath(fullPath)
+7. useGLTF(modelPath) - loads and parses GLB
+
+// Key Implementation:
+useGLTF.preload(fullPath);  // Preload before rendering
+const gltf = useGLTF(modelPath);  // Actual load
+```
+
+**Loading Characteristics**:
+- **Type**: On-demand with optional preloading
+- **Preloading**: Yes - `useGLTF.preload()` is called (Line 281)
+- **Caching**: useGLTF hook caches in session
+- **Scale Handling**: Custom scale from `extra_data.scale`
+- **Fallback**: ProbeFallback component renders red sphere if load fails
+- **Performance**: Preload triggered immediately, improves perceived load time
+
+### 2.3 Background/Static Assets
+
+**File**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/components/Scene.tsx`
+
+```typescript
+// Procedural Assets (NO external files):
+1. BackgroundStars (radius=300, count=5000, procedural)
+2. AsteroidBelts (procedurally generated)
+3. Nebulae (procedurally generated)
+4. Constellations (data-driven but rendered procedurally)
+
+// Data-Driven Assets (fetched from API):
+1. Stars (real star catalog data)
+2. Galaxies (CanvasTexture generated)
+3. Satellites/Planets (textures fetched on demand)
+```
+
+**Observations**:
+- Extensive use of procedural generation reduces asset file count
+- Galaxy textures created with CanvasTexture (no disk files)
+- Star data loaded from API, rendered with simple geometry
+
+---
+
+## 3. Loading Flow & Architecture
+
+### 3.1 Request Path
+
+```
+Frontend Component
+    ↓
+fetchBodyResources(bodyId, type)
+    ↓
+API Call: /api/celestial/resources/{bodyId}?resource_type=texture|model
+    ↓
+Backend API (Port 8000)
+    ↓
+Vite Proxy Dev: localhost:8000/upload/{type}/{filename}
+OR
+Nginx Production: proxy to backend
+    ↓
+Actual File: /backend/upload/{type}/{filename}
+    ↓
+Response to Frontend
+    ↓
+useTexture() or useGLTF()
+    ↓
+Three.js Renderer
+```
+
+### 3.2 API Integration Points
+
+**File**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/utils/api.ts`
+
+```typescript
+// Fetch function signature:
+export async function fetchBodyResources(
+  bodyId: string,
+  resourceType?: string
+): Promise<{
+  body_id: string;
+  resources: Array<{
+    id: number;
+    resource_type: string;
+    file_path: string;      // e.g., "texture/2k_sun.jpg"
+    file_size: number;
+    mime_type: string;
+    created_at: string;
+    extra_data?: Record<string, any>;  // scale, etc.
+  }>;
+}>
+```
+
+---
+
+## 4. Vite Build Configuration
+
+**File**: `/Users/jiliu/WorkSpace/cosmo/frontend/vite.config.ts`
+
+```typescript
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    host: '0.0.0.0',
+    port: 5173,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:8000',
+        changeOrigin: true,
+      },
+      '/upload': {
+        target: 'http://localhost:8000',
+        changeOrigin: true,
+      },
+      '/public': {
+        target: 'http://localhost:8000',
+        changeOrigin: true,
+      },
+    },
+  },
+})
+```
+
+**Current Configuration Analysis**:
+- **No explicit asset optimization**: No image compression, no WebP conversion
+- **No size limits**: All assets proxied without size constraints
+- **No chunking strategy**: Vite default chunks (1.2 MB JS bundle observed)
+- **Proxy strategy**: All assets proxied through backend (good for dynamic content)
+
+---
+
+## 5. Build Output Analysis
+
+**Dist Directory**: `/Users/jiliu/WorkSpace/cosmo/frontend/dist/`
+- **Total Size**: ~20 MB
+- **JavaScript Bundle**: 1.2 MB (index-c2PfKiPB.js)
+- **CSS**: 9.8 KB
+- **Textures**: ~7.9 MB (in dist, smaller than backend copy)
+- **Models**: ~12.8 MB (in dist)
+
+**Key Finding**: Textures in dist folder are smaller than backend source, suggesting some optimization (JPEG compression) during build/deploy.
+
+---
+
+## 6. Lazy Loading & Code Splitting
+
+**File**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/App.tsx`
+
+```typescript
+// Already Implemented:
+const InterstellarTicker = lazy(() => 
+  import('./components/InterstellarTicker')
+    .then(m => ({ default: m.InterstellarTicker }))
+);
+
+const MessageBoard = lazy(() => 
+  import('./components/MessageBoard')
+    .then(m => ({ default: m.MessageBoard }))
+);
+
+const BodyDetailOverlay = lazy(() => 
+  import('./components/BodyDetailOverlay')
+    .then(m => ({ default: m.BodyDetailOverlay }))
+);
+
+// Wrapped in Suspense:
+<Suspense fallback={null}>
+  <InterstellarTicker />
+</Suspense>
+```
+
+**Status**: 
+- Lazy loading implemented for 3 non-critical components
+- Suspense fallback set to null (no skeleton loading)
+- No lazy loading for 3D rendering components (CelestialBody, Probe, Scene)
+
+---
+
+## 7. Current Optimization Opportunities
+
+### 7.1 Identified Issues
+
+1. **No Texture Compression**
+   - Total texture size: 19 MB (backend) → 7.9 MB (dist)
+   - JPEG quality likely could be reduced further
+   - No WebP fallback for modern browsers
+   - No LOD (Level of Detail) system
+
+2. **Large Model File**
+   - Juno.glb: 8.6 MB (30% of all model assets)
+   - No model optimization/decimation
+   - No LOD for probes
+   - All vertices/triangles loaded even when zoomed out
+
+3. **No Batch Asset Loading**
+   - Each body texture loaded individually
+   - 10+ API calls for visible celestial bodies
+   - No batching or parallel loading optimization
+   - No request deduplication
+
+4. **All-or-Nothing Texture Loading**
+   - Texture loading blocks render until complete
+   - Falls back to gray if load fails
+   - No progressive/streaming load
+
+5. **Limited Caching Strategy**
+   - useTexture/useGLTF cache only within session
+   - No persistent browser cache headers optimization
+   - No service worker caching
+
+6. **Background Star Data**
+   - Stars component loads 1000+ star systems per API call
+   - No pagination or frustum culling
+   - All stars rendered regardless of visibility
+
+### 7.2 Existing Optimizations
+
+```
+POSITIVE:
+✓ Procedural generation for backgrounds (saves ~10 MB+ in textures)
+✓ useGLTF.preload() for probe models
+✓ useTexture hook caching
+✓ Lazy loading for non-critical UI components
+✓ Reused geometry for identical objects (stars use single SphereGeometry)
+✓ Billboard optimization for labels (distance culling)
+✓ Selective texture filtering (excludes atmosphere/night variants)
+```
+
+---
+
+## 8. Performance Summary
+
+### Asset Totals:
+- **Textures**: 19 MB (backend) / 7.9 MB (dist)
+- **Models**: 24 MB (backend) / 12.8 MB (dist)
+- **JavaScript**: 1.2 MB
+- **Total Transfer**: ~32 MB initial + on-demand loading
+
+### Loading Pattern:
+- **Initial Load**: 1.2 MB (JS) + procedural background rendering
+- **Per-Scene**: ~100-500 KB (depending on visible bodies)
+- **Per-Probe**: 280 KB - 8.6 MB (first load)
+
+### Current Bottlenecks:
+1. Juno probe (8.6 MB) loading time
+2. Sequential texture API calls
+3. No partial/progressive loading
+4. Large JPEG files (Moon: 1 MB, Venus: 868 KB)
+
+---
+
+## 9. File Locations Summary
+
+### Source Code:
+- **Main 3D Scene**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/components/Scene.tsx`
+- **Texture Loading**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/components/CelestialBody.tsx` (Line 102-123)
+- **Model Loading**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/components/Probe.tsx` (Line 261-295)
+- **API Integration**: `/Users/jiliu/WorkSpace/cosmo/frontend/src/utils/api.ts`
+- **Build Config**: `/Users/jiliu/WorkSpace/cosmo/frontend/vite.config.ts`
+
+### Asset Locations:
+- **Texture Source**: `/Users/jiliu/WorkSpace/cosmo/backend/upload/texture/`
+- **Model Source**: `/Users/jiliu/WorkSpace/cosmo/backend/upload/model/`
+- **Texture Build Output**: `/Users/jiliu/WorkSpace/cosmo/frontend/dist/textures/`
+- **Model Build Output**: `/Users/jiliu/WorkSpace/cosmo/frontend/dist/models/`
+- **Documentation**: `/Users/jiliu/WorkSpace/cosmo/frontend/PERFORMANCE_OPTIMIZATION.md`
+
+---
+
+## 10. Recommendations (Priority Order)
+
+### Quick Wins (1-2 hours):
+1. Implement image compression (JPEG quality: 80-85%)
+2. Add WebP format with JPEG fallback
+3. Set proper Cache-Control headers on backend
+4. Implement batch/parallel texture loading
+
+### Medium Term (4-8 hours):
+1. Add texture LOD (Load specific resolution by distance)
+2. Implement model decimation for Juno probe
+3. Add progressive texture loading (low-res → high-res)
+4. Implement frustum culling for star systems
+
+### Long Term (16+ hours):
+1. Implement texture atlas for small textures
+2. Add KTX2/Basis texture compression
+3. Implement virtual scrolling for star catalog
+4. Add service worker for persistent caching
+

frontend/src/components/CelestialBody.tsx

@@ -9,7 +9,7 @@ import { useTexture, Billboard } from '@react-three/drei';
 import type { CelestialBody as CelestialBodyType } from '../types';
 import { calculateRenderPosition, getOffsetDescription } from '../utils/renderPosition';
 import { fetchBodyResources } from '../utils/api';
-import { PLANET_SIZES, SATELLITE_SIZES, getCelestialSize } from '../config/celestialSizes';
+import { getCelestialSize } from '../config/celestialSizes';
 import { createLabelTexture } from '../utils/labelTexture';
 
 interface CelestialBodyProps {

frontend/src/config/celestialSizes.ts

@@ -6,64 +6,31 @@
 /**
  * Planet rendering sizes (radius in scene units)
  */
-export const PLANET_SIZES: Record<string, number> = {
-  Mercury: 0.35,
-  Venus: 0.55,
-  Earth: 0.6,
-  Mars: 0.45,
-  Jupiter: 1.4,
-  Saturn: 1.2,
-  Uranus: 0.8,
-  Neptune: 0.8,
-  Pluto: 0.2,
-  // Default for unknown planets
+/**
+ * Celestial body rendering sizes configuration
+ * Shared across components for consistent sizing
+ * 
+ * STRICT RULE: Sizes are determined solely by body TYPE, not by name.
+ * This ensures consistent visualization scales across categories.
+ */
+
+export const TYPE_SIZES: Record<string, number> = {
+  star: 0.4,         // Base mesh size (glow effects make it look larger)
+  planet: 0.6,       // Unified size for all planets (Earth-like)
+  dwarf_planet: 0.18,
+  satellite: 0.12,
+  comet: 0.12,
+  asteroid: 0.10,
+  probe: 0.1,
+  
+  // Fallback
   default: 0.5,
 };
 
 /**
- * Satellite rendering sizes (radius in scene units)
- */
-export const SATELLITE_SIZES: Record<string, number> = {
-  Moon: 0.15,
-  // Default for unknown satellites
-  default: 0.12,
-};
-
-/**
- * Star rendering sizes (radius in scene units)
- */
-export const STAR_SIZES: Record<string, number> = {
-  Sun: 0.4,
-  // Default for unknown stars
-  default: 0.4,
-};
-
-/**
- * Comet rendering sizes (radius in scene units)
- * Comets are typically small with a bright nucleus
- */
-export const COMET_SIZES: Record<string, number> = {
-  // Famous comets
-  Halley: 0.15,
-  // Default for unknown comets
-  default: 0.12,
-};
-
-/**
- * Get the rendering size for a celestial body by name and type
+ * Get the rendering size for a celestial body by type only
  */
 export function getCelestialSize(name: string, type: string): number {
-  switch (type) {
-    case 'planet':
-    case 'dwarf_planet':
-      return PLANET_SIZES[name] || PLANET_SIZES.default;
-    case 'satellite':
-      return SATELLITE_SIZES[name] || SATELLITE_SIZES.default;
-    case 'star':
-      return STAR_SIZES[name] || STAR_SIZES.default;
-    case 'comet':
-      return COMET_SIZES[name] || COMET_SIZES.default;
-    default:
-      return 0.5;
-  }
+  return TYPE_SIZES[type] || TYPE_SIZES.default;
 }
+

frontend/src/pages/admin/CelestialBodies.tsx

@@ -425,12 +425,12 @@ export function CelestialBodies() {
       dataIndex: 'type',
       key: 'type',
       filters: [
-        { text: '行星', value: 'planet' },
         { text: '恒星', value: 'star' },
-        { text: '卫星', value: 'satellite' },
-        { text: '探测器', value: 'probe' },
+        { text: '行星', value: 'planet' },
         { text: '矮行星', value: 'dwarf_planet' },
+        { text: '卫星', value: 'satellite' },
         { text: '彗星', value: 'comet' },
+        { text: '探测器', value: 'probe' },
       ],
       onFilter: (value, record) => record.type === value,
       render: (type: string) => {
@@ -582,12 +582,12 @@ export function CelestialBodies() {
                     rules={[{ required: true, message: '请选择类型' }]}
                   >
                     <Select>
+                      <Select.Option value="star">恒星</Select.Option>
                       <Select.Option value="planet">行星</Select.Option>
                       <Select.Option value="dwarf_planet">矮行星</Select.Option>
                       <Select.Option value="satellite">卫星</Select.Option>
-                      <Select.Option value="probe">探测器</Select.Option>
-                      <Select.Option value="star">恒星</Select.Option>
                       <Select.Option value="comet">彗星</Select.Option>
+                      <Select.Option value="probe">探测器</Select.Option>
                     </Select>
                   </Form.Item>
                 </Col>
@@ -800,12 +800,12 @@ export function CelestialBodies() {
                     rules={[{ required: true, message: '请选择类型' }]}
                   >
                     <Select>
+                      <Select.Option value="star">恒星</Select.Option>
                       <Select.Option value="planet">行星</Select.Option>
                       <Select.Option value="dwarf_planet">矮行星</Select.Option>
                       <Select.Option value="satellite">卫星</Select.Option>
-                      <Select.Option value="probe">探测器</Select.Option>
-                      <Select.Option value="star">恒星</Select.Option>
                       <Select.Option value="comet">彗星</Select.Option>
+                      <Select.Option value="probe">探测器</Select.Option>
                     </Select>
                   </Form.Item>
                 </Col>

frontend/src/pages/admin/NASADownload.tsx

@@ -83,9 +83,12 @@ export function NASADownload() {
     planet: '行星',
     dwarf_planet: '矮行星',
     satellite: '卫星',
+    comet: '彗星',
     probe: '探测器',
   };
 
+  const typeOrder = ['star', 'planet', 'dwarf_planet', 'satellite', 'comet', 'probe'];
+
   useEffect(() => {
     loadBodies();
   }, []);
@@ -451,41 +454,46 @@ export function NASADownload() {
           >
             <Collapse
               defaultActiveKey={[]}
-              items={Object.entries(bodies).map(([type, typeBodies]) => ({
-                key: type,
-                label: (
-                  <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-                    <span>{typeNames[type] || type}</span>
-                    <Checkbox
-                      checked={typeBodies.every(b => selectedBodies.includes(b.id))}
-                      indeterminate={
-                        typeBodies.some(b => selectedBodies.includes(b.id)) &&
-                        !typeBodies.every(b => selectedBodies.includes(b.id))
-                      }
-                      onChange={(e) => {
-                        e.stopPropagation();
-                        handleTypeSelectAll(type, e.target.checked);
-                      }}
-                    >
-                      全选
-                    </Checkbox>
-                  </div>
-                ),
-                children: (
-                  <Space orientation="vertical" style={{ width: '100%' }}>
-                    {typeBodies.map((body) => (
-                      <Checkbox
-                        key={body.id}
-                        checked={selectedBodies.includes(body.id)}
-                        onChange={(e) => handleBodySelect(body.id, e.target.checked)}
-                      >
-                        {body.name_zh || body.name} ({body.id})
-                        {!body.is_active && <Badge status="default" text="(未激活)" style={{ marginLeft: 8 }} />}
-                      </Checkbox>
-                    ))}
-                  </Space>
-                ),
-              }))}
+              items={typeOrder
+                .filter(type => bodies[type] && bodies[type].length > 0)
+                .map((type) => {
+                  const typeBodies = bodies[type];
+                  return {
+                    key: type,
+                    label: (
+                      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
+                        <span>{typeNames[type] || type}</span>
+                        <Checkbox
+                          checked={typeBodies.every(b => selectedBodies.includes(b.id))}
+                          indeterminate={
+                            typeBodies.some(b => selectedBodies.includes(b.id)) &&
+                            !typeBodies.every(b => selectedBodies.includes(b.id))
+                          }
+                          onChange={(e) => {
+                            e.stopPropagation();
+                            handleTypeSelectAll(type, e.target.checked);
+                          }}
+                        >
+                          全选
+                        </Checkbox>
+                      </div>
+                    ),
+                    children: (
+                      <Space orientation="vertical" style={{ width: '100%' }}>
+                        {typeBodies.map((body) => (
+                          <Checkbox
+                            key={body.id}
+                            checked={selectedBodies.includes(body.id)}
+                            onChange={(e) => handleBodySelect(body.id, e.target.checked)}
+                          >
+                            {body.name_zh || body.name} ({body.id})
+                            {!body.is_active && <Badge status="default" text="(未激活)" style={{ marginLeft: 8 }} />}
+                          </Checkbox>
+                        ))}
+                      </Space>
+                    ),
+                  };
+                })}
             />
           </Card>
         </Col>