OLD STARS EXPLODE TO FORM GAS AND STARDUST. OUR MILKY WAY IS A PART OF THE LOCAL GROUP. The Milky Way is a barred spiral galaxy with an estimated visible diameter between 170,000 and 200,000 light-years (ly). They estimate it to contain 100–400 billion stars and at...
THE UNIVERSE’S TURNING POINTS: 1. THE BIG BANG 2. STARS LIGHT UP (LET THERE BE LIGHT). 3. THE CREATION OF COMPLEX ELEMENTS 4. HYDROGEN & HELIUM COMBINE YO START THE PERIODIC TABLE. 5. THE FIRST STARS BURN OUT TO CONTINUE PRODUCING THE PERIODIC TABLE UP TO...
