Cosmic Journeys Season 1 Episode 7 How Large Is the Universe?

Cosmic Journeys is a science documentary series that takes a deep dive into the mysteries of the universe and explores our understanding of the cosmos. In season 1 episode 7, titled "How Large Is the Universe?," viewers are taken on a journey to explore the vastness of the universe and the challenges scientists face in trying to grasp its sheer size.

The episode starts by introducing the concept of the observable universe, which is the portion of the universe that we can see from Earth. Scientists believe that the observable universe is around 93 billion light-years in diameter, but they also know that there is much more beyond the limits of what we can see.

To understand just how large the universe is, the episode takes us on a scale model journey, starting with the Earth and zooming out to the limits of the observable universe. Along the way, viewers get a sense of just how tiny our planet is in the grand scheme of things, and how insignificant we are in comparison to the vastness of the universe.

The episode also explores the concept of the cosmic microwave background radiation, which is the oldest light in the universe. By studying the patterns in this radiation, scientists have been able to make important discoveries about the composition of the universe and its origins.

Another topic explored in "How Large Is the Universe?" is the concept of dark energy, which is believed to be the force that is causing the expansion of the universe to accelerate. While scientists know very little about dark energy, they believe that it makes up around 68% of the universe.

Throughout the episode, scientists and experts share their insights into the challenges of understanding the universe. They discuss the limitations of our current technology and the need for new tools that can help us to explore the most distant corners of the cosmos.

In the end, the episode leaves viewers with a sense of awe and wonder at the vastness of the universe, and a reminder that our understanding of it is still very much in its infancy. "How Large Is the Universe?" is a captivating and informative episode that is sure to leave viewers with a newfound appreciation for the mysteries of the cosmos.