The telescope wasn't invented until about 1604, so "early" astronomers had no telescopes.
The big limitation was a lack of telescopes.
Yes, both of them. And they also use reflecting telescopes.
Their eyes, ground-based telescopes, space telescopes.
Telescopes
We use telescopes or satellites
they use space probes,satellites,and of coarse,telescopes.
Astronomers can use their eyes to study the stars. They can also use various telescopes that either refract, reflect, and detect exotic formations.
Astronomers use radio telescopes, infrared telescopes, and space-based telescopes to map the shape of the Milky Way. They measure the positions and motions of stars, gas, and dust to create a three-dimensional map of our galaxy.
Astronomers cannot locate extrasolar planets with telescopes because these planets are outside of our solar system and too far away for telescopes to directly observe. Instead, astronomers use indirect methods such as radial velocity and transit techniques to detect these distant planets.
TELESCOPES
Astronomers use telescopes to study stars and planets by capturing light from these celestial objects and analyzing it. They can gather data on the properties of stars and planets, such as their temperature, composition, and distance from Earth, to deepen our understanding of the universe. Telescopes come in various forms, such as optical telescopes, radio telescopes, and space telescopes like the Hubble Space Telescope.
Type your answer here... telescopes answered by Jacob welborn