Star Nebula

Awe-Inspiring Facts About the Size of the Universe You Never Knew

As humans, we have always been fascinated by the mysteries of the cosmos, from the tiniest subatomic particles to the largest superclusters of galaxies.

But have you ever stopped to consider how big the universe is? And how many universes there are? In this blog, we will explore some astonishing data about the size of the universe.

The Observable Universe

The observable universe is the part of the universe that we can see from our location in space. This includes everything that has emitted light since the beginning of time, estimated to be about 13.8 billion years ago. This universe is constantly expanding, and scientists believe that it is currently about 93 billion light-years in diameter.

To put this into perspective, if you were to travel at the speed of light, it would take you 93 billion years to cross the observable universe. However, this is only a fraction of what we think is our universe, as there are parts of it that we cannot see.

The Size of Our Milky Way Galaxy

Our Milky Way galaxy is just one of the billions of galaxies in the observable universe. It is estimated to be about 100,000 light-years in diameter and contains around 100 billion stars. Our solar system is located on the outer edge of the Milky Way, about 30,000 light-years from the center.

To give you an idea of just how big the Milky Way is, consider this: if the Milky Way were the size of a grain of sand, the entire Earth would be the size of the observable universe.

How Big is the Universe?

Scientists believe that the universe is infinite in size, but this is still a topic of debate. The universe is also expanding, which means it is getting bigger daily.

The size of the universe is still unknown and difficult to comprehend.

How Many Universes are There?

Some scientists and theorists believe there is only one universe, while others think there are infinite universes with unique characteristics.

One theory, the multiverse theory, suggests that multiple universes exist parallel to our own. These universes may have different physical laws, constants and, conceivable to some, even different versions of ourselves.

The Size of this Universe and Beyond in Battlefield Earth

To write the epic science fiction novel, Battlefield Earth, L. Ron Hubbard also did research into the size of the galaxy and the known universe. In the book, he even surmised how many universes there are.

These are his hand-written notes from his research:Battlefield-Earth-handwritten-noteTranscribed, the notes read:

Light year = about 6 trillion miles

400 billion suns in this galaxy

This universe contains perhaps 100 billion galaxies

From Earth to the center of this galaxy is about 30,000 light years.

In the Battlefield Earth novel, the author went on to use this research as well as the concept of multiple universes, a topic of much debate among scientists and theorists:

“Jonnie [protagonist] had been amazed to find in other texts that there were four hundred billion suns in this galaxy alone and that this universe contained more than a hundred billion galaxies. And he had sixteen universes to look at. The possible bases of hostile peoples were easier to mentally encompass. From Earth to this galaxy’s center was about thirty thousand light-years. And one light-year was about six trillion miles.”

In the epilogue to the story, you will find data about an alleged seventeenth universe.

Virgin Territory

The universe is a vast and mysterious place that appears to be virgin territory. To ignorant Earthlings, anyway.


NASA’s Cosmic Times How big is the universe How Big is the Observable Universe? American Museum of Natural History, How Did the Universe Begin?

Other articles and resources you may be interested in:

Mission Earth: Science Fiction & Satire

New to L. Ron Hubbard’s fiction? Start here.

Click here for more information about Battlefield Earth

Click here to get a free copy of the first thirteen chapters of Battlefield Earth.

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