An astronomer.
A person who studies the planets and stars is an astrologist.
A person who studies stars, planets and phases of the moon is called an astronomer.
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".
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.
An astronomer.
A person who studies space is called an astronomer. They observe and analyze celestial bodies such as planets, stars, and galaxies to better understand the universe.
A person who studies planets and galaxies is called an astronomer. Astronomers observe and analyze celestial bodies such as planets, stars, and galaxies to understand their composition, behavior, and evolution. They use telescopes and other instruments to gather data and make scientific discoveries about the universe.
Astronomy.
Dont know but I think it is called a astronomy
An astronomer.
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.