How the Universe was formed?

This course is about how the universe was formed

What is the Universe?

The Universe


The Universe is everything we can touch, feel, sense, measure or detect. 

It includes living things, planets, stars, galaxies, dust clouds, light, and even time.

How big is the Universe?

No one knows for sure how big the universe is. It could be infinitely large. 

Scientists, however, measure the size of the universe by what they see. They call this the observable universe. 

The observable universe is around 93 billion light years across. 

Theories explains how the universe was formed?

There are different theories that could explain how was universe made.

The theory that gives the best explanation is the Big Bang.

About 13.8 billion years ago, a dramatic event marked the beginning of both space and time. From nothing, the universe suddenly appeared as a tiny point of pure energy.

Understanding the Big Bang

Within an instant, the universe expanded trillions of times and then continued to get larger, at the same time, cooling down from its hot birth.

During the first fractions of a second, a vast, “soup” of tiny, interacting particles formed out of the intense energy. 

Tens of thousands of years later, actual atoms formed and then, after hundreds of millions of years, the very first stars and galaxies were formed.

More about the Big Bang

Did you know?

Why are planets round?

A planet's gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere (another way of saying a three-dimensional circle). 

What is the universe?

  • A group of planets going around a sun/star
  • Everything we can touch, feel, sense, measure or detect
  • A space rock crashing into a planet

When was the universe formed?

  • About 10 billion years ago
  • 100 years ago
  • About 14 billion years ago

Universe Quiz

  • The Big Bang
    Theory explaining the Origin of the Universe
  • The Universe
    Includes all living things, planets, stars, galaxies, dust clouds, light and time.
  • A Solar System
    It was formed because of the explosion of a star called the Supernova