Understanding Our Star, the Sun: Revealing its Solar Mysteries
Overview
Astrophysicist David Alexander introduces the Sun as our closest and most important star. Beginning with a look at how humanity’s understanding of the cosmos has evolved, he traces the scientific shift from early geocentric models to the heliocentric theory that placed the Sun at the center of our solar system: a historical transition that reshaped our view of the universe and set the stage for modern astronomy.
With this foundation, Professor Alexander then turns to the Sun itself, explaining what makes the Sun a star and exploring its structure—from its core to its outer layers to its dynamic surface. Learn how the Sun generates energy, how solar activity shapes life on Earth and drives space weather, and how we are using modern technology to study solar science today.

