He sketched several inventions

Galileo not only improved the telescope but also created other items. He created a "temperature glass," which is used to understand temperature differences. He also created the "sector," which included the water pump, pendulum clock, and military compass.

Not only was Galileo passionate about science, but he also enjoys making things. His innovations weren't always driven by emotion, though. After his father passed away, he battled to pay off his debts, including the dowry that had been promised to his in-law brothers, and his inventions turned into a side source of income.

The military compass for cannonball aim, one of his successful inventions, earned him a respectable sum of money. Other innovations that have not received much recognition include a ballpoint pen, an automatic tomato picker, a light reflector that reflects light through a building, a pocket comb that can be used as an eating tool, and a thermometer for measuring temperature differences.

Although Galileo is renowned for using telescopes to investigate the cosmos, it's vital to remember that he did not invent the instrument! He learned about telescopes and made the decision to combine certain lenses so that he could make advantage of their magnifying abilities to view the sky.