Ideographic: A spectacular 翟 star 日; 翟 also provides the pronunciationRadical:

meaning for yào:

  • - bright
  • - glorious
  • - one of the seven planets of premodern astronomythe seven planets of premodern astronomy (the Sun, the Moon, Mercury, Venus, Mars, Jupiter, and Saturn)Saturday (used in ancient Chinese astronomy)obsidian (mining)Sunday (used in ancient Chinese astronomy)heavenly bodies (esp. the sun, moon or five visible planets)