Estimating the Number of Atoms in the Observable Universe

Explore a simple method for estimating the number of atoms in the observable universe in this 21-minute video. Learn how to calculate the number of atoms in a typical star, estimate the number of stars in a typical galaxy, and determine the number of galaxies in the observable universe. Follow along as the video breaks down the process into manageable steps, combining calculations to arrive at a final estimate. Gain insights into the scale of the cosmos and improve your understanding of astronomical concepts through this engaging Physics Explained presentation.

Introduction
Calculating the mass of the Sun
Calculating the number of stars in the Milky Way
Calculating the number of galaxies
Combining our calculations