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How was the universe formed?

  • Galaxies The universe is a huge open space made up of billions of galaxies and an even larger number of stars. Our galaxy is called the Milky Way. Our solar system, including the Sun, the planets and their moons, forms just a tiny part of the Milky Way.

    How was the universe formed?

    Q How was the universe formed? A The universe was born more than 15 billion years ago. It is believed that the universe began as a small ball of fire. This fireball grew larger and larger until one day it exploded, to form the universe that we know. Q How big is the universe? A No one knows how big the universe really is. There are at least 100 billion galaxies that we know of. However, this number keeps growing as better telescopes are developed and we see more and more galaxies. On top of that, the galaxies are moving away from each other, causing the universe to expand. Some scientists believe that the universe will never stop expanding, while others think that one day it will begin to shrink until it becomes a fireball again.

    What is a galaxy? A A galaxy is a group of billions of stars, dust and gas bound together by gravitational force. A galaxy can either be on its own or in a cluster. Galaxies come in different shapes and sizes. Scientists have divided them into three categories based on their shapes – spiral, elliptical (oval) and irregular (no shape).

    Expanding universe Scientists think that stars and other elements in the universe are continuing to move away from each other due to the force of the original Big Bang.