Cosmology is the study of the origin, evolution, and eventual fate of the universe. It is a discipline that bridges science and philosophy, seeking to answer some of the most profound questions humanity has ever asked.
The Big Picture
Our observable universe spans approximately 93 billion light-years in diameter and contains roughly 2 trillion galaxies. The universe has been expanding for approximately 13.8 billion years since the Big Bang.
But cosmology isn't just about vast distances and ancient times. It's about understanding our place in the cosmic order. Every atom in our bodies was forged in the hearts of stars that lived and died billions of years before our solar system formed.
Open Questions
Despite remarkable advances in our understanding, profound mysteries remain. What is dark matter? What is dark energy? What happened before the Big Bang? These questions drive cosmologists to push the boundaries of human knowledge.
The study of cosmology reminds us that we are part of something vastly larger than ourselves, yet connected to it in intimate ways we are only beginning to understand.