Spectrograph.
An optical telescope is the simplest instrument to view the heavens.
Telescope.
Taiping Heavenly Kingdom ended in 1864.
Sky blue
A Comet
A spectrometer.
astronomers
Astronomers.
The study of heavenly bodies is known as astronomy. Astronomers observe and analyze the stars, planets, galaxies, and other celestial objects to better understand their composition, behavior, and interactions.
Johannes Kepler
An optical telescope is the simplest instrument to view the heavens.
Yes, they do.
telescope
Typically, astronomers use various types of telescopes. These days, everything is being controlled by computers, so you'd need to include "computers" in any list of tools.
Telescope.
they studied the heavenly bodies,mapped the stars,the planets,and the phases of the moon.
Optical or radio telescope