PBS Space Time Season 2015 Episode 3 How Do You Measure the Size of the Universe?

PBS Space Time is a documentary series that explores the mysteries of the universe through the lens of theoretical physics. The third episode of the 2015 season, titled "How Do You Measure the Size of the Universe?" delves into the fascinating topic of measuring the scale of our universe.

The episode kicks off by discussing the concept of parallax, which is used to measure the distance of nearby stars. Parallax is the apparent shift in the position of an object when viewed from different angles, and by measuring this shift, astronomers can calculate the distance of nearby stars with a fair degree of accuracy.

However, parallax only works on a relatively small scale, and when it comes to measuring the size of the universe, astronomers have to get more creative. The episode explores several different methods that have been used over the years, from using the brightness of certain types of stars to calculating the redshift of distant galaxies.

One particularly interesting method discussed in the episode is the use of supernovae as cosmic yardsticks. When a star runs out of fuel and explodes in a supernova, it emits an incredible amount of energy that can be detected from hundreds of millions of light-years away. By studying the brightness of these supernovae, astronomers can gauge their distance from Earth and use that information to estimate the size of the universe.

Another method explored in the episode is the measurement of the cosmic microwave background radiation, which is the residual heat left over from the Big Bang. By studying the patterns in this radiation, scientists can deduce certain characteristics of the universe, including its size and geometry.

Throughout the episode, the viewer is taken on a journey through time and space as the various methods used to measure the size of the universe are explained and put into context. From the ancient Greeks to modern-day cosmologists, the quest to understand the true scale of our universe has been ongoing for thousands of years, and this episode of PBS Space Time does an excellent job of chronicling that journey.

In addition to its informative content, the episode is also visually stunning, with incredible graphics and animations that help bring the science to life. It's a fascinating exploration of one of the most awe-inspiring questions in all of science, and a must-watch for anyone interested in the mysteries of the cosmos.

Overall, "How Do You Measure the Size of the Universe?" is a captivating and enlightening episode of PBS Space Time that explores the cutting-edge science behind one of the most intriguing questions in all of science. With its engaging narration, stunning visuals, and expertly crafted storyline, it's a must-watch for anyone interested in the wonders of our universe.