Are we alone in this universe?

Do aliens live in this universe? Or are we the only living beings in this universe?
Before we get to know about aliens, you should know about the universe, and what created the universe.

Billions of years ago and even today in this universe

Think for a minute: in a time of your blink, 100 stars die and 200 stars create – everything started off with a Big Bang.
14 billion years ago, all energy and matter were concentrated at a single point, thousand times smaller than a pinhead. The rest of the space was empty. Then occurred a tremendous explosion called the Big Bang. This explosion threw fragments outwards with a great force. As the time passed, the fragment, which gradually filled the space, combined to form hydrogen and helium atoms. It is these gases that formed the stars and the galaxies. This was stated by the father of this theory, Edwin Hubble.

Imagine that you are taking a rubber balloon and blowing it up a bit. Then you are making some dots with a pen and blowing it up again. You will see the dots not only expanding but also moving away. This is how the universe works; our universe is still expanding in all directions.

The galaxy

Planet Earth is a tiny speck in the spiral galaxy called the Milky Way. On a clear and dark night, you can see the Milky Way as a band of lights across the sky. A galaxy is a group of hundreds and billions of stars. Our closest star is the Sun.

The other planet to live on

Each planet in our solar system is fascinating. Mars, our neighbour, is roughly half the size of our Earth but has 2 moons. Mars is quite similar to Earth. It has the biggest volcano. From the presence of canals, gorges, and ice caps, it seems that once Mars had water. Does Mars have aliens?

Are we with aliens?

Like the Milky Way, there are billions of galaxies with billions of stars. What if one of the planets in this universe contains aliens and living organisms like us? Is it that they have a totally different way of communication that humans never found out?

Dheekshitha

VII-B

Mahatma Global Gateway CIE