Galileo is the first recorded instance of the use of a telescope, though it is well known that he developed the idea for it from a toy that arrived from a traveling merchant.
Yes
The first person to use a telescope for astronomical observation was Galileo Galilei in the early 17th century. He made groundbreaking discoveries, such as the moons of Jupiter and the phases of Venus, using his telescope.
Galileo
Many of the larger craters on the moon can be seen from earth without a telescope, so nobody discovered craters on the moon with a telescope.
Galileo Gailei is the first person credited with using the telescope for astronomical observations. He did not invent the telescope. He is the first to have seen moons going around Jupiter, the rings of Saturn (though he incorrectly identified them), and that the Moon had cliffs and craters.
While not the inventor of the telescope, Galileo is widely believed to be the first person to use a telescope for astronomy.
Galileo was the first person to use a telescope for astronomical research.
Galileo
Galileo Galilei.
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Yes
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.
The first person to use a telescope for astronomical observation was Galileo Galilei in the early 17th century. He made groundbreaking discoveries, such as the moons of Jupiter and the phases of Venus, using his telescope.
Galileo
Galileo perfected the telescope.
Many of the larger craters on the moon can be seen from earth without a telescope, so nobody discovered craters on the moon with a telescope.