The Milky Way is the galaxy that includes our Solar System, with the name describing the galaxy’s appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
The Milky Way is made up of about 90% dark matter, matter which cannot be seen and about 10% “luminous matter”, or matter that we can see with our eyes.
This large quantity of dark matter causes an invisible halo that surrounds the Milky WayEarth is in the second largest galaxy of the Local Group – a galaxy called the Milky Way.
The Milky Way is a large spiral galaxy. Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of theway out from the center of the Galaxy.