Astronomy.
Astronomy.
Astronomy
Astronomy is the study of planets and stars, among many other things.
Astronomy
The Muslim Empire group charted the stars and planets.
A huge mass of stars and planets is called a galaxy.
That doesn't make sense. There are stars, and there are planets. If you mean "planets around stars, other than the Sun", those are usually called "extrasolar planets" or "exoplanets".
Using the stars (and planets) to predict future events on Earth is called Astrology. There aren't many who would still call it a "science," though.
Astronomy.
The term "planet" is derived from the Greek word "planetes," which means "wanderer." In ancient times, planets were described as moving stars compared to the fixed stars in the sky. This is why they were called planets.
Improved technology for observing the planets and stars..
biology