I think the main issue was not to approve <span>Emancipation Proclamation, which made all the slaves in the south were free. I'm not sure about this answer </span>
10 is obviously the answer
Answer: Johannes Kepler
Explanation: Johannes Kepler (Weil der stadt, December 27th, 1571 - Regensburg, November 15th, 1630), a key figure in the scientific revolution, was a German astronomer and mathematician; known primarily for his laws on the movement of planets in their orbit around the sun. He was a collaborator of Tycho Brahe, whom he replaced as imperial mathematician of Rudolph II.
Answer:
Observation
Explanation:
Why? Well I really don't know.