Essay on Dark Matter and Dark Energy

The Invisible Foundation of the Universe

The universe is a vast and mysterious place, yet most of what humans observe is only a small fraction of what actually exists. When we look at stars, planets, and nebulae, we are seeing "normal" matter. However, modern science has revealed that the vast majority of the cosmos consists of two invisible components: dark matter and dark energy. Together, these mysterious forces account for approximately 95 percent of everything in existence. Understanding these phenomena is essential because they dictate how galaxies form and how the universe will eventually end.

Dark Matter as Cosmic Glue

Dark matter acts as an invisible scaffolding that holds the universe together. Unlike the matter that makes up our bodies or the sun, dark matter does not emit, absorb, or reflect light. This makes it impossible to see with traditional telescopes. Scientists only know it exists because of its gravitational pull on visible objects. For example, galaxies rotate much faster than they should based on the amount of visible stars and gas they contain. Without the extra gravity provided by dark matter, these galaxies would fly apart. It serves as a "cosmic glue" that allows large structures to form and remain stable over billions of years.