The Expanding Universe
Understanding Cosmic Expansion Through Relativity and Modern Physics
Discover how the universe is fundamentally different from what we once believed. This book guides you through the revolutionary understanding that space itself is expanding, carrying galaxies away from each other at ever-increasing speeds. You'll explore how Einstein's groundbreaking theories of relativity transformed our comprehension of gravity, space, and time—providing the mathematical framework that makes cosmic expansion possible. From the early 20th-century observations that first revealed an expanding universe to today's puzzling discovery of accelerating expansion driven by mysterious dark energy, you'll learn the evidence, the physics, and the profound implications. Whether you're curious about the Big Bang's true nature, wondering what dark energy really is, or seeking to understand how scientists measure cosmic distances and velocities, this book demystifies these concepts without requiring advanced mathematics. Grounded in contemporary physics and observational astronomy, it connects fundamental principles to the cosmos we observe, revealing how the universe's expansion shapes everything from galaxy formation to our cosmic future.
Est. Length
222 pages (10 chapters)
Language
English
Publication date
Nov 17, 2025
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