Cosmology

Cosmology is the scientific study of the origin, structure, evolution, and fate of the Universe. It weaves together observations from Astronomy, Gravity, Theory of Relativity, and Quantum Mechanics to answer humanity's oldest questions: How did everything begin? What is it made of? Where is it going?

Modern cosmology rests on the Big Bang theory—the idea that the universe emerged from an extraordinarily hot, dense state roughly 13.8 billion years ago and has been expanding ever since. Cosmologists map the Cosmic Microwave Background, study distant Galaxies, and measure the universe's acceleration to test their models. They grapple with profound mysteries: the nature of Dark Matter and Dark Energy, which together comprise 95% of all existence, and whether our universe is one of many in a larger Multiverse.

The field spans scales from the subatomic realm, where quantum effects seeded the universe's earliest moments, to the cosmic web of galaxy clusters stretching billions of light-years across space. Einstein's revolutionary ideas transformed cosmology from philosophy into precise science, though deeper truths await discovery.

Related

Big Bang, Galaxies, Dark Matter, Astronomy, Expansion of the Universe