It was Galileo. He first thought thet the earth was revolving around the sun, but others didn't believe him because they thought that God created the world as the center. He made a telescope and proved to everyone that the solar system is following the geometrical system, the Earth revolving around the Sun.
Note that Galileo did not invent the telescope. He was, however, the first person to use a telescope to examine the heavens. Previously, telescopes had only been used to look at distant locations here on Earth.
Galileo used and made the first telescope.
Telescope
Galileo first used a telescope to observe the sky.
Galileo built the first telescope in 350BC. He used it to survey the night sky.
Telescope
Note that Galileo did not invent the telescope. He was, however, the first person to use a telescope to examine the heavens. Previously, telescopes had only been used to look at distant locations here on Earth.
Galileo was the first person to use a telescope for technological uses.
Galileo used and made the first telescope.
Femi Gamma Ray Telescope
Telescope
Telescope
Galileo first used a telescope to observe the sky.
Galileo built the first telescope in 350BC. He used it to survey the night sky.
The first telescope was used by Galileo Galilei (first used in 1609) to see the faraway planets and stars of the galaxy.
Galileo was the first person to use a telescope for astronomical research.
Galileo Galilei first used the "new" telescope in 1609