Why is the sun called a star?

The sun is called a star because it is a massive, luminous sphere of plasma held together by its own gravity. Like other stars in the universe, the sun emits light and heat through nuclear fusion reactions in its core. Stars are classified as celestial bodies that emit their own light and heat due to the nuclear reactions happening within them, and the sun fits this definition perfectly.

The sun is a star because it is a large, luminous ball of hot plasma that emits its own light and heat. Stars are self-gravitating objects made up mostly of hydrogen and helium that produce energy through nuclear fusion reactions in their cores. The sun is the closest star to Earth and the center of our solar system, providing light, heat, and energy for life on our planet. Like other stars, the sun emits electromagnetic radiation across a wide range of wavelengths, including visible light, ultraviolet radiation, and X-rays. The sun's energy is essential for life on Earth and is responsible for driving the weather, ocean currents, and the growth of plants.