EU - Astrophysicist of the Day

This book was written by Stephen Hawking.

Which of the four was an Astrophysicist and Planetary Scientist?

What was the name of the first KBO that Jane Luu discovered?

Which Astrophysicist linked gravity and quantum theory?

Who encouraged NASA to take the photo known as "The Pale Blue Dot"?

Which of the four has written over 200 works on many subjects?

Who won a prize for discovering an archeological treasure dating back to the formation of the solar system?

Who encouraged astronomers to root their observations in the laws of physics and the material realm?

Who was one of the earliest scientists to propose that there might be life on other planets?

Alhazen was a mathematician, physicist, and astronomer.