
LifeStyle
Andromeda
KEN CAMPBELL
...middle and spiral arms of stars gradually getting thinner towards the edges. It is huge, about 180,000 light years across and containing around 400 billion stars. Our solar system is located in one of the spiral arms about three quarters of the way out ... light years across and containing about 800 billion stars. When you see the Andromeda Galaxy you are seeing it as it was 2.5 million years ago, even before there were humans on the Earth.