Introduction Have you ever looked up at the night sky and wondered, how big is the universe? The truth is, the universe is so vast that our human brains can hardly imagine its size. Scientists use special tools, measurements, and…
Introduction: The Universe’s Greatest Mystery Look up at the night sky. You might think you’re seeing most of the universe—millions of stars shining, galaxies stretching across space, and planets circling suns. But here’s the shocking truth: everything you can see…
The Big Bang theory is the leading scientific explanation for how our universe began. It states that the universe started as an incredibly hot, dense point and has been expanding and cooling ever since. This expansion isn’t an explosion in…