All across the immense reaches of time and space, energy is being exchanged, transferred, released in a great cosmic pinball game we call our universe.
To see how energy stitches the cosmos together, and how we fit within it, we now journey through the power scales of the universe From atoms nearly frozen to stillness. To Earth's largest explosions. From stars, colliding, exploding. To distant centers of power so strange and violent ... whole story

From a distance, our galaxy would look something like this. A flat spiral, some 100,000 light years across, with pockets of gas, clouds of dust, and about 400 billion stars rotating around the galaxy's center.
That center – bulging up and out of the galactic disk – is tightly packed with stars. Thick dust and blinding starlight have long obscured our vision into the mysterious inner regions of this so-called "bulge".
And yet, ... whole story