Quick Notes

Quick Notes

Science Chapter 11: Galaxy
11.1 The Milky Way Galaxy
 
A galaxy is a system that includes millions of stars, gas, dust and other matter. Galaxies come in many shapes and sizes. There are several types of galaxies in the universe. Among the examples of galaxies are spiral galaxies, elliptical galaxies and non-uniform/irregular galaxies.
 
Source: ms.wikipedia.org
 
11.1  The Milky Way Galaxy
 
The Milky Way galaxy is one of the galaxies in the universe. Humans can see the large Milky Way galaxy in the night sky because the solar system is inside this galaxy.
 

Milky Way

  • The band of stars is named as the Milky Way because of its milk-like shape in the night sky
  • The Milky Way Galaxy is a barred spiral galaxy with two main arms and a bright, dense star center
  • A side view of the Milky Way galaxy looks like a thin disk with a bulge in the middle
 
  • The Milky Way Galaxy
 
  • Top view of the Milky Way
 
  • Side view of the Milky Way
 

Size of the Solar System in the Milky Way galaxy

  • The Solar System is at the edge of one of the spiral arms of the Milky Way galaxy
  • Humans can only see part of the Milky Way galaxy from Earth because Earth is at the edge of this galaxy
  • The size of the Solar System is very small compared to the size of the Milky Way galaxy