A place for observing stars and planets is usually called an observatory.
The collection of planets and their star (primary) are called a solar system. The planets themselves are called "exoplanets." Once we can tell they fit our definition of planet (having cleared their orbits, etc.) we would probably just refer to them as planets.
Planets orbit stars.
the study of stars and planets is colled Astronomy
Stars are formed when elevation gass escapes the sun. They will then catch heat from planets, the planets orbit will then place the stars in a special order. Then the star will glow for 10,000 years then will die.
the Greeks called the planets wanderers
The viewing of the stars is called star gazing! It's called "naked eye observation".
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.
Astronomy.
An astronomer.
The collection of planets and their star (primary) are called a solar system. The planets themselves are called "exoplanets." Once we can tell they fit our definition of planet (having cleared their orbits, etc.) we would probably just refer to them as planets.
A person who studies the planets and stars is an astrologist.
Planets orbit stars.
Those are called "planets". The ancient Greeks distinguished "fixed stars" - which is what we nowadays simply call "stars"; and the moving stars, which in Greek is called "planets".A planet certainly looks like a star (a very bright star, in some cases), but nowadays they are not usually called "stars".
Tucson, Arizona
Astronomers or Meteorologists