The telescope was invented in 1620 so they used that. Man's observation of the stars and planets has been going on thousands of years.
They were there, above their head most nights - they could not help but observe them.
People who study stars are called astronomers. They observe and analyze celestial objects and phenomena, including stars, planets, galaxies, and more, to better understand the universe.
You observe its motion, with respect to the background stars.
People studied stars 100 years ago using telescopes, photographic plates, and spectroscopes. They would observe the positions, motions, and spectra of stars to better understand their characteristics, such as temperature, composition, and distance. This observational data was then analyzed and interpreted to advance our knowledge of the universe.
People studied stars 200 years ago primarily through the use of telescopes equipped with lenses and mirrors to observe and analyze the positions, movements, and characteristics of stars. They also relied on manual calculations and observations to track the movements of stars in the night sky over time. Astronomy was a combination of observation, mathematics, and theory to understand the nature of stars.
They were there, above their head most nights - they could not help but observe them.
At the Age of Exploration they used telescope to observe stars.
To observe the stars, you would use a telescope.
People who study stars are called astronomers. They observe and analyze celestial objects and phenomena, including stars, planets, galaxies, and more, to better understand the universe.
Yes, when we observe stars, we are looking at the past because the light from stars takes time to travel to Earth, so we see them as they were in the past.
telescope
Exactly the way people who don't own telescopes observe stars now: With their eyes. Of course, there was a lot more to be seen back in those days, since the electric light didn't exist either. Until the 19th Century, the starry sky everywhere was about as good as the best you can find anywhere today.
Galileo
You observe its motion, with respect to the background stars.
An Astronomical Observatory is a place from which to observe stars. Any place far from cities and bright lights will do. You can look with your eyes - "Naked-eye observation" or use binoculars or a telescope.
People studied stars 100 years ago using telescopes, photographic plates, and spectroscopes. They would observe the positions, motions, and spectra of stars to better understand their characteristics, such as temperature, composition, and distance. This observational data was then analyzed and interpreted to advance our knowledge of the universe.
How do we know? Because we can observe it happening.