How Do We Know the Age of the Universe?

The video explores human curiosity about the universe's origin, focusing on how astronomers estimate its age. It explains the use of distant objects and redshift to determine age, and how the universe's expansion rate, discovered through type Ia supernovas and the cosmic microwave background, refines these estimates. The video highlights the challenges and advancements in understanding the universe's age, emphasizing the importance of scientific progress.

What are the two main tools astronomers use to calculate the age of the universe?

How does redshift help astronomers determine the distance and age of stars?

What significant discovery in 2011 contributed to our understanding of the universe's expansion?

What role does the cosmic microwave background (CMB) play in understanding the universe's expansion?

What is the estimated age of the universe according to current scientific understanding?