Cesium Mars

// Set the default ellipsoid to Mars instead of WGS84
Cesium.Ellipsoid.default = Cesium.Ellipsoid.MARS;

const viewer = new Cesium.Viewer("cesiumContainer", {
  // This is a global 3D Tiles tileset so disable the
  // globe to prevent it from interfering with the data
  globe: false,
  // 2D and Columbus View are not currently supported
  // for global 3D Tiles tilesets
  sceneModePicker: false,
  // Don't use Earth imagery layers for other celestial bodies 
  baseLayerPicker: false,
  // Geocoder is not supported for locations on Mars
  geocoder: false,
});

try {
  const tileset = await Cesium.Cesium3DTileset.fromIonAssetId(3644333);
  viewer.scene.primitives.add(tileset);
} catch (error) {
  console.log(error);
}