mysterious characters

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Across
  1. 3. American alternative rock band with their popular hit "Smells Like Teen Spirit"
  2. 5. super hero bat
  3. 6. E=mc2
  4. 7. astronaut who participated in the Apollo 11 mission
  5. 9. German composer known for his famous symphonies
Down
  1. 1. fictional character playing the role of the dark lord of the sith in a mythical saga
  2. 2. creator of a French luxury brand
  3. 4. designer behind street art in south africa
  4. 6. creator of a tower in Paris
  5. 8. black president of the united states