What Happens If You Fall Into a Black Hole? Imagine falling toward a black hole. At first, nothing dramatic happens. As you get closer, however, gravity becomes stronger and spacetime becomes increasingly distorted. Light bends around the black hole, distant objects appear warped, and the difference in gravity between your head and feet begins to […]
What Happens If You Fall Into a Black Hole? Read Post »
Light travels through space at about 300,000 kilometres per second. Yet once light crosses the boundary of a black hole, it cannot return to the outside universe. Why? The simple answer is not that a black hole “pulls” light backward. According to Einstein’s general relativity, a black hole curves spacetime so strongly that, inside its
Why Can’t Light Escape a Black Hole? The Science Behind the Event Horizon Read Post »
Black holes are formed when matter collapses under gravity so strongly that the collapse cannot be stopped. One of the clearest ways this happens is through the death of a massive star. The process begins inside the star. For most of its life, nuclear fusion produces energy and pressure that support the star against its
How Are Black Holes Formed? From Massive Stars to Cosmic Giants Read Post »
If you have ever wondered what is a black hole, the basic answer is simpler than it first appears. A black hole is a region of spacetime where gravity is so strong that, beyond a boundary called the event horizon, nothing can escape to the outside—not even light. Despite the name, a black hole is
What Is a Black Hole? A Simple Explanation of These Cosmic Objects Read Post »
The Milky Way did not appear as a finished spiral galaxy. It was assembled over billions of years as gravity gathered matter, gas formed stars, and smaller galaxies and stellar systems became part of a growing galaxy. So, how did the Milky Way form? Astronomers think its history began more than 13 billion years ago,
How Did the Milky Way Form? The Story of Our Galaxy Read Post »
The first galaxies did not appear as finished collections of stars. They grew from small differences in the distribution of matter in the young universe. Gravity gradually amplified those differences, dark matter gathered into increasingly massive halos, gas fell into them, and stars began to form inside these growing structures. That is the basic story
How Did the First Galaxies Form? A Journey Into the Early Universe Read Post »
What was the Universe like before there were stars, galaxies, or even atoms? Today, the Universe is filled with billions of galaxies, stars, planets, gas clouds, and enormous structures spread across space. But about 13.8 billion years ago, the cosmos was in a much hotter, denser state. Over time, it expanded and cooled. Particles formed
Universe Timeline: From the Big Bang to Today Read Post »
If the universe is about 13.8 billion years old, how can scientists know what happened in its earliest history? They did not observe the Big Bang itself. No telescope captured an explosion taking place at a particular location in space. The Big Bang is also not the name for an explosion into empty space. In
How Scientists Know the Big Bang Happened Read Post »
If the first stars had not yet formed, how can we know what the universe looked like when it was only a few hundred thousand years old? The answer is microwave background radiation, more commonly called the cosmic microwave background (CMB). The CMB is ancient electromagnetic radiation that fills the universe. It was released when
What Is Microwave Background Radiation? The Universe’s Oldest Light Explained Read Post »