Celestial Bodies

This book consists of 3 titles, which are the following: Galaxies - Galaxies are dynamic entities, constantly evolving through processes like mergers, collisions, and interactions with neighboring galaxies. When galaxies merge, their stars, gas, and dust can undergo dramatic transformations, leading to the formation of new stars and restructuring of the galaxy's shape. These interactions can trigger intense bursts of star formation and feed supermassive black holes at the galaxies' centers, leading to the emission of powerful jets of radiation. Meteors - Meteors, also known as shooting stars, are remnants of comets or asteroids that orbit the Sun. When these objects cross Earth's path, they enter the atmosphere at high speeds, often exceeding 25,000 miles per hour (40,000 kilometers per hour). As they travel through the atmosphere, the air resistance causes them to heat up and vaporize, creating the bright streaks of light we observe. Stellar Evolution - Stellar evolution refers to the process by which a star changes over the course of time. This field of astrophysics studies the formation, life, and death of stars, which involves a series of complex physical processes and transformations. Here, we outline the key stages and concepts in stellar evolution.