Who was famous for the invention of the vacuum pump in the 17^th century and also pioneered the concept of the absolute vacuum of space, measured the weight of air and used air pressure to predict the weather?

Otto von Guericke

The correct answer is Option (2) - Otto von Guericke

Otto von Guericke was a prominent scientist of the 17^th century known for inventing the vacuum pump. He demonstrated the concept of atmospheric pressure and conducted experiments on the nature of air and vacuum. His work laid the foundation for our understanding of the properties of gases and the concept of vacuum.