MST SATHI AKTER

The History Of The Sun ?

The Birth of a Star The Sun’s origin lies in a cold, dark region of space known as a molecular cloud. A disturbance, possibly from a nearby supernova, caused the collapse of a portion of this cloud around 4.6 billion years ago. As gravity pulled the gas and dust inward, the center became increasingly dense and hot, eventually igniting nuclear fusion. This marked the birth of our Sun, a yellow dwarf star that was small in comparison to the vastness of the universe but a giant by human standards—it was more than 100 times larger than Earth. The remnants of the Sun's formation were surrounding this new star. Planets, moons, asteroids, and comets were formed as the particles in this whirling disk began to stick together over time. Earth emerged from this debris and settled into orbit, where it would bask in the Sun’s light for billions of years.