Galileo wasn't the first to make a telescope but he discovered the telescope at the age of 46.
Galileo discovered stars by using the telescope?
Europa was discovered in 1610 by Galileo when he pointed a telescope at Jupiter.
The Amazon River was not discovered by Galileo using a telescope.
He discovered it on the moon.
Galileo discovered the telescope, and phases of the moon
Galileo made his first telescope in 1609, modeled after telescopes produced in other parts of Europe that could magnify objects three times. He created a telescope later that same year that could magnify objects twenty times. With this telescope, he was able to look at the moon,
The Galileo telescope was not "discovered" but rather invented by Galileo Galilei in 1609. He was the first to use a refracting telescope for astronomical purposes, which revolutionized our understanding of the cosmos.
He improved the telescope. discovered a moon with cravers.
Galileo
He discovered that interesting results could be obtained by using a telescope.
Galileo discovered Saturn in 1610 through his telescope. He observed its unique shape and rings but was unable to identify them accurately at the time.
He discovered that Saturn has rings and he discovered Jupiter's four largest moons.