Hayat Ashraf

Planets, stars, and galaxies are key components of the universe, each with its own unique characteristics and roles. Here's an overview of these celestial objects: 1. Planets: Planets are celestial bodies that orbit around a star and do not produce their own light. They are usually spherical in shape and are larger than asteroids and comets. In our solar system, there are eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Planets can have a variety of features, such as atmospheres, moons, and geological formations. They play a crucial role in the study of planetary science and the search for extraterrestrial life. 2. Stars: Stars are massive, luminous spheres of hot plasma held together by their own gravity. They are the fundamental building blocks of galaxies and are responsible for the production of light and heat through nuclear fusion reactions in their cores. Stars vary in size, temperature, and color. The classification of stars is based on thei...