How big is our galaxy?
The average radius of our galaxy, The Milky Way, is about 50,000 light years. To put that in perspective, if a commercial airliner, let’s say a Boeing 747 flew at a speed of 600mph then it would take approximately 50 billion years to fly from the centre to the edge. So to get from one end to the other, it would take 100 billion years in the plane. Our universe is only 14 billion years young...
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