Estrellas y galaxias: ¿qué son las estrellas?

The video tutorial explains that the Sun is the closest star to Earth, appearing brighter and larger due to its proximity. It describes stars as hot balls of gases, emitting energy through chemical reactions. Astronomers study stars by analyzing the light they emit. The video also covers how distances in space are measured, using kilometers for shorter distances and light-years for those beyond the solar system. Examples include Proxima Centauri, 4.3 light-years away, and Ragel in Orion, 910 light-years away.

What new insight or understanding did you gain from this video?