Is the Universe Infinite? Exploring the Boundaries of Space and Time

✨The observable universe has a sphere-like shape with a radius of 45 billion light years.

🌌The observable universe contains approximately 200 billion galaxies.

🌍The concept of an infinite universe is difficult to visualize, but it would mean that space goes on forever in every direction.

🔁A finite universe could have a shape like a hypersphere or a hyperdonut, where 3D-space is curled on itself.

🌟In an infinite universe, every combination of particles could occur an infinite number of times, potentially resulting in an infinite number of copies of ourselves.

What is the observable universe?

—The observable universe is the portion of the universe that is visible to us, limited by the distance that light has traveled in the last 14 billion years.

Could there be things outside the observable universe?

—The observable universe is defined as 'all there is,' so the concept of something existing outside of it is undefined.

How do we know the universe had a beginning?

—Scientific evidence, such as the cosmic microwave background radiation and the expansion of the universe, strongly supports the idea of a Big Bang that marked the beginning of our universe.

Is it possible to travel to the edge of the universe?

—Due to the limitation of the speed of light, it is impossible to reach or observe anything beyond the observable universe.

Are there multiple copies of ourselves in an infinite universe?

—If the universe is truly infinite, the vast combinations of particles could lead to the existence of infinite copies of ourselves, although the chance of meeting or interacting with them is extremely small.

00:04The universe had a beginning 14 billion years ago and has been expanding ever since.

00:24The observable universe has a sphere-like shape with a radius of 45 billion light years.

01:21The observable universe contains approximately 200 billion galaxies.

02:56A finite universe could have a shape like a hypersphere or a hyperdonut, where 3D-space is curled on itself.

06:27In an infinite universe, every combination of particles could occur an infinite number of times, potentially resulting in an infinite number of copies of ourselves.

09:59The universe is finite for us, with an edge in time. We can only interact with the observable universe.