message: change moon storybook
diff: import React from "react";
  import { storiesOf } from "@storybook/react";
  +import Cesium from "cesium";
  import Viewer from "../Viewer";
  import Moon from "../Moon";
  +const radius = Cesium.Math.LUNAR_RADIUS * 10;
  +
  export default () => {
  storiesOf("Moon", module).add("default", () => (
  <Viewer full>
  - <Moon />
  + <Moon ellipsoid={new Cesium.Ellipsoid(radius, radius, radius)} />
  </Viewer>
  ));
  };
  