Every one of us is unique and important, but at the same time, we’re a microscopic part of something that’s beyond comprehension.

Our Earth, solar system, sun and billions of other stars, along with who knows how many other planets, are all orbiting around our home Milky Way Galaxy. Miles are useless for trying to define how enormous our galaxy is. The numbers would be beyond mind-boggling. Instead, we use light-years, the distance a beam of light would travel in a year’s time. That works out to just short of 6 trillion miles.

Our Milky Way is believed to be a spiral disk of stars with a big bulge in the middle. It spans well over 100,000 light-years in diameter, but the thickness of most of the disk is very thin by comparison, around 1000 light-years. The central bulge of our home galax

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