We can not answer your question because, stupidly, you have not told us what "them" are.
Astronomers use celestial spheres and mathematical equations to approximate the distances between the star and other celestial objects.
Supervisor
Ancient astronomers were able to observe the movements of the planets in the night sky, track their positions relative to the stars, and document their retrograde motion. They also noted patterns in the planets' movements and made connections between their positions and earthly events.
Being a researcher in manufacturing organization how can you search the opportunities and monitor the threats of your product?
Astronomers use coordinate systems like equatorial and ecliptic coordinates to map the heavens. These systems help astronomers locate and study celestial objects by providing a framework for referencing positions in the sky.
supervisor
Supervisor
Astronomers can predict eclipses because they understand the movements of the Earth, Moon, and Sun in space. By tracking their positions and orbits, astronomers can calculate when the Moon will pass in front of the Sun (solar eclipse) or when the Earth will pass between the Sun and the Moon (lunar eclipse). This knowledge allows astronomers to forecast eclipses with accuracy.
The supervisor
Uranus was observed deviating from its predicted orbit, leading astronomers to hypothesize the existence of an unseen planet exerting gravitational influence. This discrepancy prompted the search for Neptune, which was later discovered in 1846.
supervisor
supervisor