Answer: Mustard Gas
Explanation:
Mustard gas is incredibly lethal and was used more in world war one than world war two that is a common misconception.
According to the copernicus, the first duty of the astronomer is observation.
What did Copernicus believe?
Nicolaus Copernicus (1473–1543) was a mathematician and astronomer who proposed that the sun was stationary in the center of the universe and the earth revolved around it.
How was Copernicus theory proved?
- Galelio discovered evidence to support Copernicus' heliocentric theory when he observed four moons in orbit around Jupiter.
- Beginning on January 7, 1610, he mapped nightly the position of the 4 “Medicean stars” (later renamed the Galilean moons).
Learn more about Copernicus here:
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Did not want to give up any of its power to a central council....i think
