Crossword

123456
Across
  1. 2. - This is why the sky is blue
  2. 5. We see phases of this because of reflection from our nearest star.
  3. 6. He discovered that prism can be used to split white light into it's components.
Down
  1. 1. Joseph Fraunhofer invented and used it to discover absorption lines of the stars.
  2. 3. A kind of lens used to magnify objects.
  3. 4. First person to see the Rings of Saturn and the Moons of Jupiter with his telescope.