This invisible "frenemy" does not emit or reflect light but provides the gravitational glue that keeps galaxies from flying apart. It makes up roughly 85% of all matter.
One of the book's most profound takeaways is the . The same laws of physics that govern a falling apple on Earth also govern the rotation of distant galaxies and the behavior of light across the void. Astrophysics For People In A Hurry
Discovered much later, this mysterious force acts as a "cosmological constant" that is currently driving the universe's expansion to accelerate. The Cosmic Perspective This invisible "frenemy" does not emit or reflect
In the first trillionth of a second, the four fundamental forces of nature—, Electromagnetism , and the Strong and Weak Nuclear forces —were unified as one. As the universe expanded and cooled, these forces "untangled," and the first particles of matter began to form. A crucial cosmic coincidence occurred when matter slightly outnumbered antimatter by a billion-to-one ratio; if they had been perfectly equal, they would have completely annihilated each other, leaving nothing behind but light. Invisible Architects: Dark Matter and Dark Energy The same laws of physics that govern a