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 did not invent the telescope, but is credited with being the first person to use it as an astronomical instrument in 1609. He was one of the first modern scientists-he collected evidence (data) to support scientific claims. Professional astronomers do not spend their time looking through telescopes.