Solar System vs. Galaxy vs. Universe!
What is the difference between the terms: Solar System, Galaxy, and Universe?
Answer: Basically SIZE is the biggest distinction.
Here are some definitions from a dictionary:
Solar System: Consists of the Sun, and everything bound to it by gravity. This includes the 8 planets and their moons, the asteroids, the dwarf planets, all the Kuiper belt objects, the meteoroids, comets and interplanetary dust.
Galaxy: large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. The Milky Way measures about 100,000 light-years across, and is thought to contain 200 billion stars.
Universe: the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.
So to sum it up:
- We live on planet Earth which is part of our local Solar System.
- Our Solar System includes the Sun and everything that orbits the Sun.
- Our Sun, is just one Star in the Milky Way Galaxy.
- The Milky Way Galaxy is just one Galaxy in the Universe.
- Find out how many Galaxies are in the Universe.
- Look at super neat photos of Galaxies.
- Become a galaxy hunter from the comfort of your own computer!
Check out this brand new book by Terence Dickinson! This book has an incredible collection of hubble photos and interesting descriptions in over 300 pages!!!