Earth & Space Science
You get to learn all about galaxies, including our own Milky Way galaxy. Learn about the formation and expansion of the universe, including the big bang theory.
After completing this tutorial, you will be able to complete the following:
What are galaxies?
~ Galaxies are large groupings of stars, planets, and other objects found throughout the universe.
How many galaxies do scientists believe exist in the universe?
~ Astronomers believe that there are billions of galaxies scattered throughout the universe.
How many stars are believed to be contained in each galaxy?
~ The number of stars found in a galaxy depends on the size of the galaxy. Many smaller galaxies are thought to contain around a few million stars, while larger ones are believed to contain more than 1 trillion stars.
|Approximate Time||2 Minutes|
|Pre-requisite Concepts||Students should be able to define galaxy, Milky Way, and planets.|
|Course||Earth & Space Science|
|Type of Tutorial||Animation|
|Key Vocabulary||galaxy, Milky Way, planets|