What is space?
In astronomy and physics, space refers to the vast, three-dimensional expanse that exists beyond the Earth's atmosphere and includes all matter, energy, and empty space between celestial objects such as stars, planets, and galaxies. It is commonly referred to as the "universe." Space is mostly composed of a vacuum, which means that it contains little or no matter. However, it is not completely empty as it contains a few particles of gas, dust, and radiation. These particles are spread out across space in very low densities, making them difficult to detect or measure. The study of space is known as astronomy, and it involves the observation and analysis of celestial objects and phenomena, such as planets, stars, galaxies, black holes, and supernovae. Through the study of space, scientists have been able to gain insights into the origins, composition, and evolution of the universe.
The Journey Through a Star's Life
Stars are filled with life, lasting for billions and billions of years. An interesting concept about stars is that a larger size means that they have a shorter lifespan than stars who may appear minute. Stars are born in nebulae, which are dust clouds primarily composed of hydrogen. One of these gaseous masses, known as protostars, demonstrate the star in its nascent phase. As it minimizes in size, it rotates at a quicker speed. This is due to the conservation of angular momentum. Forces are pressurizing the protostar, and it eventually reaches its T Tauri phase. After millions of years pass by, the core is ignited and heats up to a burning temperature. It goes into its main sequence phase for approximately 90% of its life. The hydrogen located in a star transforms into helium as it approaches its final stages. In the core of the star, it sinks and causes it to have a flaming temperature. These stars are known as red giants Once it sheds its layers, it becomes a dense white dwarf. All white dwarfs darken and halted its process of energy production. Their last and final stage is becoming a black dwarf.