EVERY star you can see in the sky with the naked eye belongs to our galaxy, the Milky Way. Most of these, including our sun, are part of a spiral arm that stretches out from the heart of the galaxy.
But the Milky Way’s dense centre is packed with stars and other spiral arms that sit in a flat disc in space. From our position, the view towards the middle of this disc looks like a band arching across the sky.
Astronomers aren’t sure precisely how many stars are contained in our galaxy, but estimates put it at between 100 billion and 400 billion. The …
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