cleanup of planet dialog

import DarkModeIcon from "@mui/icons-material/DarkMode"; // Moons

import CookieIcon from '@mui/icons-material/Cookie'; // Asteroids

import TravelExploreIcon from '@mui/icons-material/TravelExplore'; // Footprints.

// import PetsIcon from '@mui/icons-material/Pets';                 // Other

// import SatelliteAltIcon from '@mui/icons-material/SatelliteAlt'; // possible

// import ViewTimelineIcon from '@mui/icons-material/ViewTimeline'; // footprint

// import WhereToVoteIcon from '@mui/icons-material/WhereToVote';   // icons.

import ExpandLess from '@mui/icons-material/ExpandLess';

import ExpandMore from '@mui/icons-material/ExpandMore';

import { textTransform } from "@mui/system";

/**

 * Controls css styling for this component using js to css

  },

};

// Delete if new data loading works

// Unless we add images here

// Why is Puck/Titania not on this list?

const planets = [

  ["Mercury"],

  ["Venus"],

  ["Earth"],

  ["Mars"],

  ["Jupiter"],

  ["Saturn"],

  ["Uranus"],

  ["Neptune"],

  ["Pluto"],

];

const moons = [

  "Moon",

  "Ceres",

  "Mimas",

  "Titan",

  "Deimos",

  "Tethys",

  "Phoebe",

  "Iapetus",

  "Dione",

  "Enceladus",

  "Hyperion",

  "Io",

  "Callisto",

  "Europa",

  "Ganymede",

  "Rhea",

  "Phobos",

  "Vesta",

  "Charon",

];

/**

 * Dialog for selecting planets

 * @param {open, onClose, selectedValue} props