what is an airplane made out of and how do they put it all together from the fuselage to the electronics in the plane, Please with all the boring details.
Hence, prior to the invention of the telescope, nothing was known about the planet besides its position on the sky. The Italian scientist Galileo Galilei was the first person known to use a telescope to make astronomical observations. His records indicate that he began observing Mars through a telescope in September 1610.
Galileo pioneered experimental scientific method and was the first to use a refracting telescope to make important astronomical discoveries. In 1609 Galileo learned of the invention of the telescope in Holland. From the barest description he constructed a vastly superior model. Galileo made a series of profound discoveries using his new telescope, including the moons of the planet Jupiter and the phases of the planet Venus (similar to those of Earth's moon).