As part of its program to enhance astronomy education, the Sharjah Academy for Astronomy, Space Sciences, and Technology (SAASST) organized a lecture on “Introduction to Stellar Characteristics” on May 19, 2021. The lecture was given by Mr. Marwan Shwaiki, the Deputy General Director for Plantarium and Outreach Program at SAASST. Mr. Marwan presented the properties of the different stars: brightness, color, surface temperature, size, and mass. The H-R diagram was introduced to explain stellar evolution that depends on one physical property of a star: its mass. A star can live billions or maybe trillions of years if its mass is low (less than 8 solar mass), or just a couple of millions of years if its mass is large (more than 8 solar mass).