If the communication lifetime of civilizations in our galaxy is 100 million years and our galaxy is 13 billion years old, The chance of us detecting another intelligent civilization now is 1 in 130.
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 human eye.
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 the way out from the center of the Galaxy.
Our Milky Way galaxy is just one of the billions of galaxies in the universe.
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