The story of the Milky Way begins 13.6 billion
years ago, just after the big bang. It’s a time when there are no planets and
no stars, just a vast, lumpy soup of super heated hydrogen gas. Over millions of years, the temperature drops
and gravity compresses the lumps down until eventually the hydrogen molecules fuse and
ignite a star. In time, billions of stars burst into life
and the Milky Way begins to take shape.