Galileo.
Galileo was the first astronomer to use a telescope to observe celestial objects in detail. This helped him make groundbreaking discoveries such as the moons of Jupiter and the phases of Venus, which provided strong evidence for the heliocentric model of the solar system.
ITS A TELESCOPE.
The name of great Italian astronomer is Galileo. You need to read his biography. He is great as astronomer and brave soldier as well.
A Telescope.
Galileo was the first to study the sky with a telescope, record the results, and draw scientific conclusions. Before that, however, there were many people who studied the planets, and in ancient times there was a model explaining how the planets move among the stars, devised by Ptolemy.
Galileo was the first astronomer to explain why the sun and starts travel across the sky
its the telescope with suitable configuration of power.
The telescope helps astronomers the most when studying the sky.
Galileo built the first telescope in 350BC. He used it to survey the night sky.
The Andromeda galaxy was discovered using a telescope. Specifically, it was first observed by Persian astronomer Abd al-Rahman al-Sufi in the 10th century using a basic refracting telescope. Subsequent observations have been made with more advanced telescopes to study Andromeda in greater detail.
a hubble space telescope
Galileo is the first person that we know of who pointed his telescope up. Or at least, he was the first person who wrote about doing so.