Galileo Galilee (February 15, 1564 - January 8, 1642)
telescope
tools like radio and telescope and camera.
Astronomers use a telescope to view planets directly.
There were no telescopes prior to 1608, so no "ancient" astronomers ever used one.
A Telescope
Astronomers, mostly those who work for NASA. Some astronomers from Universities can also access it.
The telescope wasn't invented until about 1604, so "early" astronomers had no telescopes.
space research centre
A freaking telescope
A telescope is a tool for atronomers. Yes!
astronomers
Until the telescope was invented their greatest tool was the human eye.