What's a Solar System, a Galaxy, a Universe? Which is greater than the other? What other terms are there?

Question

What's a Solar System, a Galaxy, a Universe? Which is greater than the other? What other terms are there?

Answer 1

A solar system is the collection of a star (sometimes more than one), a few planets if they exist, a few asteroids, comets, and so forth. That's a solar system. A solar system is like a house, and those who live there are its planets.

A galaxy is a huge collection of solar systems. Our galaxy, the Milky Way, has ~300 billion stars. A galaxy is like a city. The houses within are its stars.

The Universe is the collection of the quadrillions of galaxies. The Universe is like a country, and the cities within are its galaxies.

Answer 2

Solar System - star and planets

Galaxy - billions of stars

Universe - billions of galaxies

Answer 3

A solar system is a group of planets and their moons etc that orbit around one star.  For example our solar system (mercury, venus, earth, mars etc) all orbits around the sun.  A galaxy is a group of stars, all with their own solar systems.  And the universe is the whole lot!!  That's as far as it goes!

Answer 4

Solar System-  Sun to Pluto  3.6 billion miles  (I still count Pluto in solar system.  :)   )

Sun to nearest star -- about 4 light years (9.5 trillion miles times 4)

Size of our Galaxy-- 100,000 light years across

Size of the Universe - MINIMUM size is  156 billion light years wide

http://www.space.com/scienceastronomy/my...

Other terms?--- there are hundreds

Type A Supernova

Supergiant star

Dwarf Star

Asteroid

Oort Cloud

Nebula

Star Cluster

Planetary nebula

Black Hole

Super Galaxy Cluster

Moons

Stellar Objects

Non-Stellar Objects

Carbon Star

Neutron Star

Quasar

Gamma Ray Burst

Sun Spots

Prominences

Solar Wind

Celestial Sphere

Shall I go on?